Change fork reb target   zeta_fkr_50-70.xlsx current fk reb target     .46-70s chrtd = chrome tube drag s = strait or linear the zeta curve is mostly linear 10 ips is focus for low speed r-zeta Original baseline = .46-70s with 2.5 drag. New baseline = .30-.65s to account for bushing drag.  See below. zeta_backwards_fkc_fkr.xlsx change fk reb target     new for 2.5 chrtd drag .35-.50s .49-.50s .34-.55s .49-.55s .33-.60s .48-.60s .30-.65s .48-.65s .34-.70s .52-.70s orig for 0 chrtd drag -.50 -.55 -.60 -.65 -.70 dips in the middle w-2.5 drag .50-.70 .55-.70 .60-.70 .65-.70   r-zeta factor         openDynoFk__press_target.php       5-3-23    3-24-23 5-4-23  Use .47 x 2 = .94 kg fk spr for all comparisons (we were using .96).  However, this small change is spring rate is minimal and only changes reb force by .20 lbs     .96 kg = -19.2     .94 kg = -19.0    So if we forget to change it somewhere it won't make that much difference. MONITOR R-ZETA Monitor r-zeta at 3, 10, 20 and 70ips with emphasis on 10-20 and 70.  Ignore 1ips.  Average fork seal drag is 4 lbs.   [One fork leg mounted vertical on the dyno with no side load] Cartridge rod and mv piston drag = 1.5 lbs. Oil and dust seal drag on chrome tube = 2.5 lbs. Total = 4.0 lbs. FORK DYNO TEST A fork dyno test consists of a single cartridge assembly mounted on the dyno, resulting in about 1.5 lbs 'ctg rod drag'. To include the oil and dust seal drag, we add +2.5 lbs. This is refereed to as  +2.5 chrmtd  (chrome tube drag). FORK MOUNTED ON THE BIKE With the fork mounted on the bike at rake angle, bushing drag could add an additional 8+ lbs chrome tube drag (chrmtd). [See (3883f) 2022 SEF F 450 ->  [Fk Whl Calc]  tab for bushing drag information] However, to keep things simple, we always compare rebound force and r-zeta with +2.5 chrmtd from the oil dust seal. NEW R-ZETA TARGETS [fork r-zeta explained] The fork spring rate is determined by the weight of the bike and rider. A calculation using the spring rate, leverage ratio and rebound damping force gives us a value for 'r-zeta'. The dyno test gives us the rebound force which then also gives us the (above) calculated r-zeta curve.  The fork leverage ratio is determined by the fork rake angle. For example, the leverage ratio for a fork rake angle of 26.1 deg is .898. [See (3883f) 2020 SEF F 450 ->  [Fk Whl Calc]  tab for fork lev ratio information] On the flip side, fork rebound force can be reverse engineered from the r-zeta curve.  Simply plug the spring rate and leverage ratio into the  'reverse r-zeta target formula'  to get a rebound force damping curve for the bike and rider. Simply put, the spring rate accounts for the bike and rider weight and the fork rake angle gives the leverage ratio.  All that's left is to determine the desired r-zeta curve for the application. Use the new r-zeta targets to monitor rebound force at 10-20 and 70 ips. Focus on 10-20 ips as being important for low speed rebound comparisons and small chop compliance. Slow rebound at 10-20 ips could result in packing and harshness on small chop. Focus on 70 ips for full stroke wheel return and control. If faster rebound at 10-20 ips is desired, full stroke rebound control at 70 ips is important to keep the front from feeling bouncy and busy. It's all a delicate balance.  Rebound is often overlooked, but it is fair to say that rebound is as important as, or more important than compression for ideal fork action. QUICK LOOK    Use as a quick quide to see how rebound compares in the 10-20ips range. Rebound force at 10ips for .94 kg fork spring r-zeta .70 at 10ips =    -19.0 + 2.5 chrmtd =  -21.5 lbs reb force     [-.70 x.884] r-zeta .65 at 10ips =    -17.4 + 2.5 chrmtd =  -19.9 lbs reb force     [-.65 x.874] r-zeta .60 at 10ips =    -15.9 + 2.5 chrmtd =  -18.4 lbs reb force     [-.60 x.864] r-zeta .55 at 10ips =    -14.4 + 2.5 chrmtd =  -16.9 lbs reb force     [-.55 x.852] r-zeta .50 at 10ips =    -12.8 + 2.5 chrmtd =  -15.3 lbs reb force     [-.50 x.836 Looking at AER and 4CS fork records. fastest reb at 10ips =  -15.0 stiffest reb at 10ips =  -23.0 average =  -17.5 to -18.5 Looking at KYB fork records. fastest reb at 10ips =  -17.0 fastest reb at 10ips =  -23.0 average =  -18 to -19 CONCLUSION:  We have created several rebound targets. See fork whiteboard:  'new r-zeta for 5 lbs bushing drag' - We used  (3883f) 2020 SEF F 450  for the charts below. Note the target being used. ..   Rebound force at 3 - 10 - 20 - 70 ips                         spr rate  .94 kg     spr rate  .94 kg     spr rate  .94 kg           r-zeta targ  -.70 x .984     r-zeta targ .52-70s x 1.0     r-zeta targ .34-70s x 1.0                                         +0 +2.5 zeta   +0 +2.5 zeta   +0 +2.5 zeta       3ips = -6.3 -8.8 0.96   -5.2 -7.7 0.84   -4.0 -6.5 0.71       10ips = -21.1 -23.6 0.77   -19.8 -22.3 0.73   -18.5 -21.0 0.69       20ips = -42.2 -44.7 0.73   -41.1 -43.6 0.71   -40.1 -42.6 0.70       70ips = -147.7 -150.2 0.70   -147.7 -150.2 0.70   -147.7 -150.2 0.70                                                                                                   spr rate  .94 kg     spr rate  .94 kg     spr rate  .94 kg           r-zeta targ .60 -.70 x .984     r-zeta targ .55 -.70 x .984     r-zeta targ .50 -.70 x .984                                         +0 +2.5 zeta   +0 +2.5 zeta   +0 +2.5 zeta       3ips = -5.5 -8.0 0..87   -5.0 -7.5 0.82   -4.6 -7.1 0.77       10ips = -18.5 -21.0 0.69   -17.2 -19.7 0.64   -15.9 -18.4 0.60       20ips = -37.7 -40.3 0.66   -35.6 -38.1 0.62   -33.5 -36.0 0.59       70ips = -147.7 -150.2 0.70   -147.7 -150.2 0.70   -147.7 -150.2 0.70                                                                                                                                                                                                                                                                                                                                                     Total records 70                       s             dfpr_id 626 dfpr_vs_id 3706 dfpr_yrmodsize 2020 KYB 350 dfpr_date2 12-19-20 dfpr_forktype USD DFF KYB-WP TC Dyno Test this pg spr_rate .96   vs_spr_rate dfpr_reb_1 0 dfpr_reb_2 0 dfpr_reb_3   0 - 0   0 - 0   0 dfpr_reb_4 0 dfpr_reb_5 0 dfpr_reb_10   0 - 0   0 - 0   0 dfpr_rebg_20 0       r/c ratio r 10ips / c 100ips 0 0 dfpr_reb_30 0 dfpr_reb_40   0 - 0   0 - 0   0 dfpr_reb_50 0 dfpr_reb_60 0 dfpr_reb_70   0 - 0   0 - 0   0 dfpr_id 573 dfpr_vs_id 3549 dfpr_yrmodsize 2019 KYB 350 dfpr_date2 1-1-20 dfpr_forktype USD SFF WP AER Dyno Test this pg spr_rate .96   vs_spr_rate dfpr_reb_1 -1 dfpr_reb_2 -2 dfpr_reb_3   -3 - -3   0 - -3   0 dfpr_reb_4 -4 dfpr_reb_5 -5 dfpr_reb_10   -12 - -12   0 - -12   0 dfpr_rebg_20 -31       r/c ratio r 10ips / c 100ips 0 0 dfpr_reb_30 -51 dfpr_reb_40   -72 - -72   1 - -72   1 dfpr_reb_50 -94 dfpr_reb_60 -118 dfpr_reb_70   -141 - -141   1 - -141   1 dfpr_id 570 dfpr_vs_id 3539 dfpr_yrmodsize 2019 KYB 350 dfpr_date2 12-21-19 dfpr_forktype USD SFF WP AER Dyno Test this pg spr_rate .96   vs_spr_rate dfpr_reb_1 -1 dfpr_reb_2 -2 dfpr_reb_3   -3 - -3   0 - -3   0 dfpr_reb_4 -4 dfpr_reb_5 -5 dfpr_reb_10   -12 - -12   0 - -12   0 dfpr_rebg_20 -27       r/c ratio r 10ips / c 100ips 0 0 dfpr_reb_30 -43 dfpr_reb_40   -60 - -60   0 - -60   0 dfpr_reb_50 -80 dfpr_reb_60 -99 dfpr_reb_70   -117 - -117   1 - -117   1 dfpr_id 766 dfpr_vs_id 4288 dfpr_yrmodsize 2025 SEF FTTK 250 for Rob Riner dfpr_date2 2-26-25 dfpr_forktype USD DFF KYB TC Stock Dyno this pg spr_rate .96   vs_spr_rate .94 dfpr_reb_1 -2 dfpr_reb_2 -3 dfpr_reb_3   -4 - -4   0 - -4   0 dfpr_reb_4 -5 dfpr_reb_5 -6 dfpr_reb_10   -14 - -14   0 - -14   0 dfpr_rebg_20 -31       r/c ratio r 10ips / c 100ips 0 0 dfpr_reb_30 -47 dfpr_reb_40   -65 - -65   1 - -65   1 dfpr_reb_50 -83 dfpr_reb_60 -102 dfpr_reb_70   -121 - -121   1 - -121   1 dfpr_id 768 dfpr_vs_id 4287 dfpr_yrmodsize 2025 SEF FTTK 250 Rob Riner dfpr_date2 3-16-25 dfpr_forktype USD DFF KYB TC Stock Dyno this pg spr_rate .96   vs_spr_rate .94 dfpr_reb_1 -2 dfpr_reb_2 -3 dfpr_reb_3   -4 - -4   0 - -4   0 dfpr_reb_4 -5 dfpr_reb_5 -7 dfpr_reb_10   -15 - -15   0 - -15   0 dfpr_rebg_20 -31       r/c ratio r 10ips / c 100ips 0 0 dfpr_reb_30 -47 dfpr_reb_40   -65 - -65   1 - -65   1 dfpr_reb_50 -84 dfpr_reb_60 -104 dfpr_reb_70   -122 - -122   1 - -122   1 dfpr_id 767 dfpr_vs_id 4289 dfpr_yrmodsize 2025 SEF FTTK 250 for Rob Riner dfpr_date2 2-26-25 dfpr_forktype USD DFF KYB TC Dyno Test this pg spr_rate .96   vs_spr_rate .94 dfpr_reb_1 -3 dfpr_reb_2 -3 dfpr_reb_3   -4 - -4   0 - -4   0 dfpr_reb_4 -6 dfpr_reb_5 -7 dfpr_reb_10   -16 - -16   1 - -16   1 dfpr_rebg_20 -32       r/c ratio r 10ips / c 100ips 0 0 dfpr_reb_30 -48 dfpr_reb_40   -66 - -66   1 - -66   1 dfpr_reb_50 -84 dfpr_reb_60 -104 dfpr_reb_70   -122 - -122   1 - -122   1 dfpr_id 769 dfpr_vs_id 4290 dfpr_yrmodsize 2025 SEF FTTK 250 Rob Riner dfpr_date2 3-17-25 dfpr_forktype USD DFF KYB TC GP Spec Sheet this pg spr_rate .96   vs_spr_rate .88 dfpr_reb_1 -2 dfpr_reb_2 -3 dfpr_reb_3   -5 - -5   0 - -5   0 dfpr_reb_4 -6 dfpr_reb_5 -8 dfpr_reb_10   -17 - -17   1 - -17   1 dfpr_rebg_20 -35       r/c ratio r 10ips / c 100ips 0 0 dfpr_reb_30 -52 dfpr_reb_40   -70 - -70   1 - -70   1 dfpr_reb_50 -90 dfpr_reb_60 -109 dfpr_reb_70   -129 - -129   1 - -129   1 dfpr_id 7 dfpr_vs_id 2971 dfpr_yrmodsize 2016 YZX 250 dfpr_date2 8-11-17 dfpr_forktype USD DFF KYB TC Stock Dyno this pg spr_rate .96   vs_spr_rate dfpr_reb_1 -2 dfpr_reb_2 -3 dfpr_reb_3   -4 - -4   0 - -4   0 dfpr_reb_4 -6 dfpr_reb_5 -7 dfpr_reb_10   -17 - -17   1 - -17   1 dfpr_rebg_20 -39       r/c ratio r 10ips / c 100ips 0 0 dfpr_reb_30 -62 dfpr_reb_40   -87 - -87   1 - -87   1 dfpr_reb_50 -111 dfpr_reb_60 -135 dfpr_reb_70   -159 - -159   1 - -159   1 dfpr_id 8 dfpr_vs_id 2967 dfpr_yrmodsize 2016 WRF 450 Timo Maki dfpr_date2 8-16-17 dfpr_forktype USD DFF KYB TC Dyno Test this pg spr_rate .96   vs_spr_rate .96 dfpr_reb_1 -2 dfpr_reb_2 -3 dfpr_reb_3   -5 - -5   0 - -5   0 dfpr_reb_4 -6 dfpr_reb_5 -8 dfpr_reb_10   -17 - -17   1 - -17   1 dfpr_rebg_20 -35       r/c ratio r 10ips / c 100ips 0 0 dfpr_reb_30 -52 dfpr_reb_40   -70 - -70   1 - -70   1 dfpr_reb_50 -89 dfpr_reb_60 -107 dfpr_reb_70   -126 - -126   1 - -126   1 dfpr_id 11 dfpr_vs_id 2962 dfpr_yrmodsize 2008 YZ 250 dfpr_date2 8-10-17 dfpr_forktype USD DFF KYB TC Dyno Test this pg spr_rate .96   vs_spr_rate dfpr_reb_1 -3 dfpr_reb_2 -4 dfpr_reb_3   -5 - -5   1 - -5   1 dfpr_reb_4 -6 dfpr_reb_5 -8 dfpr_reb_10   -18 - -18   1 - -18   1 dfpr_rebg_20 -35       r/c ratio r 10ips / c 100ips 0 0 dfpr_reb_30 -52 dfpr_reb_40   -70 - -70   1 - -70   1 dfpr_reb_50 -89 dfpr_reb_60 -108 dfpr_reb_70   -127 - -127   1 - -127   1 dfpr_id 635 dfpr_vs_id 3739 dfpr_yrmodsize 2020 KYB 350 for Andreas dfpr_date2 1-8-21 dfpr_forktype USD DFF KYB-WP TC Dyno Test this pg spr_rate .96   vs_spr_rate 1.02 dfpr_reb_1 -2 dfpr_reb_2 -4 dfpr_reb_3   -5 - -5   1 - -5   1 dfpr_reb_4 -6 dfpr_reb_5 -8 dfpr_reb_10   -18 - -18   1 - -18   1 dfpr_rebg_20 -39       r/c ratio r 10ips / c 100ips 0 0 dfpr_reb_30 -60 dfpr_reb_40   -82 - -82   1 - -82   1 dfpr_reb_50 -105 dfpr_reb_60 -126 dfpr_reb_70   -149 - -149   1 - -149   1 dfpr_id 611 dfpr_vs_id 3615 dfpr_yrmodsize 2014 YZF 450 Bert Reynolds dfpr_date2 7-17-20 dfpr_forktype USD DFF KYB TC GP Spec Sheet this pg spr_rate .96   vs_spr_rate .897 dfpr_reb_1 -2 dfpr_reb_2 -3 dfpr_reb_3   -4 - -4   0 - -4   0 dfpr_reb_4 -6 dfpr_reb_5 -8 dfpr_reb_10   -18 - -18   1 - -18   1 dfpr_rebg_20 -39       r/c ratio r 10ips / c 100ips 0 0 dfpr_reb_30 -59 dfpr_reb_40   -79 - -79   1 - -79   1 dfpr_reb_50 -101 dfpr_reb_60 -124 dfpr_reb_70   -147 - -147   1 - -147   1 dfpr_id 482 dfpr_vs_id 3060 dfpr_yrmodsize 2008 YZF 250 Mike Kirsch dfpr_date2 12-4-17 dfpr_forktype USD DFF KYB TC Dyno Test this pg spr_rate .96   vs_spr_rate dfpr_reb_1 -3 dfpr_reb_2 -4 dfpr_reb_3   -5 - -5   1 - -5   1 dfpr_reb_4 -7 dfpr_reb_5 -9 dfpr_reb_10   -18 - -18   1 - -18   1 dfpr_rebg_20 -36       r/c ratio r 10ips / c 100ips 0 0 dfpr_reb_30 -54 dfpr_reb_40   -72 - -72   1 - -72   1 dfpr_reb_50 -90 dfpr_reb_60 -108 dfpr_reb_70   -127 - -127   1 - -127   1 dfpr_id 515 dfpr_vs_id 3296 dfpr_yrmodsize 2014 YZF 450 dfpr_date2 7-12-14 dfpr_forktype USD DFF KYB TC Stock Dyno this pg spr_rate .96   vs_spr_rate dfpr_reb_1 -2 dfpr_reb_2 -4 dfpr_reb_3   -5 - -5   1 - -5   1 dfpr_reb_4 -6 dfpr_reb_5 -8 dfpr_reb_10   -18 - -18   1 - -18   1 dfpr_rebg_20 -39       r/c ratio r 10ips / c 100ips 0 0 dfpr_reb_30 -61 dfpr_reb_40   -83 - -83   1 - -83   1 dfpr_reb_50 -107 dfpr_reb_60 -130 dfpr_reb_70   -154 - -154   1 - -154   1 dfpr_id 572 dfpr_vs_id 3547 dfpr_yrmodsize 2019 SEF F 300 dfpr_date2 12-31-19 dfpr_forktype USD DFF KYB TC Dyno Test this pg spr_rate .96   vs_spr_rate dfpr_reb_1 -3 dfpr_reb_2 -4 dfpr_reb_3   -5 - -5   1 - -5   1 dfpr_reb_4 -6 dfpr_reb_5 -8 dfpr_reb_10   -18 - -18   1 - -18   1 dfpr_rebg_20 -39       r/c ratio r 10ips / c 100ips 0 0 dfpr_reb_30 -58 dfpr_reb_40   -79 - -79   1 - -79   1 dfpr_reb_50 -101 dfpr_reb_60 -124 dfpr_reb_70   -145 - -145   1 - -145   1 dfpr_id 609 dfpr_vs_id 3613 dfpr_yrmodsize 2014 YZF 450 for Bert dfpr_date2 7-11-20 dfpr_forktype USD DFF KYB TC Dyno Test this pg spr_rate .96   vs_spr_rate .904 dfpr_reb_1 -2 dfpr_reb_2 -3 dfpr_reb_3   -5 - -5   0 - -5   0 dfpr_reb_4 -6 dfpr_reb_5 -8 dfpr_reb_10   -18 - -18   1 - -18   1 dfpr_rebg_20 -38       r/c ratio r 10ips / c 100ips 0 0 dfpr_reb_30 -58 dfpr_reb_40   -79 - -79   1 - -79   1 dfpr_reb_50 -100 dfpr_reb_60 -122 dfpr_reb_70   -145 - -145   1 - -145   1 dfpr_id 21 dfpr_vs_id 2963 dfpr_yrmodsize 2008 YZ 250 dfpr_date2 8-10-17 dfpr_forktype USD DFF KYB TC Dyno Test this pg spr_rate .96   vs_spr_rate dfpr_reb_1 -3 dfpr_reb_2 -4 dfpr_reb_3   -5 - -5   1 - -5   1 dfpr_reb_4 -7 dfpr_reb_5 -9 dfpr_reb_10   -18 - -18   1 - -18   1 dfpr_rebg_20 -37       r/c ratio r 10ips / c 100ips 0 0 dfpr_reb_30 -55 dfpr_reb_40   -75 - -75   1 - -75   1 dfpr_reb_50 -94 dfpr_reb_60 -113 dfpr_reb_70   -132 - -132   1 - -132   1 dfpr_id 637 dfpr_vs_id 3741 dfpr_yrmodsize 2020 KYB 350 for Andreas dfpr_date2 1-10-21 dfpr_forktype USD DFF KYB-WP TC Dyno Test this pg spr_rate .96   vs_spr_rate 1.02 dfpr_reb_1 -2 dfpr_reb_2 -3 dfpr_reb_3   -5 - -5   0 - -5   0 dfpr_reb_4 -6 dfpr_reb_5 -8 dfpr_reb_10   -18 - -18   1 - -18   1 dfpr_rebg_20 -40       r/c ratio r 10ips / c 100ips 0 0 dfpr_reb_30 -62 dfpr_reb_40   -84 - -84   1 - -84   1 dfpr_reb_50 -109 dfpr_reb_60 -132 dfpr_reb_70   -156 - -156   1 - -156   1 dfpr_id 685 dfpr_vs_id 4011 dfpr_yrmodsize 2022 KYB 350 Alan Stelzig dfpr_date2 12-15-21 dfpr_forktype USD DFF KYB-WP TC Dyno Test this pg spr_rate .96   vs_spr_rate 1.0 dfpr_reb_1 -3 dfpr_reb_2 -4 dfpr_reb_3   -5 - -5   1 - -5   1 dfpr_reb_4 -7 dfpr_reb_5 -8 dfpr_reb_10   -19 - -19   1 - -19   1 dfpr_rebg_20 -41       r/c ratio r 10ips / c 100ips 0 0 dfpr_reb_30 -62 dfpr_reb_40   -85 - -85   1 - -85   1 dfpr_reb_50 -109 dfpr_reb_60 -132 dfpr_reb_70   -155 - -155   1 - -155   1 dfpr_id 610 dfpr_vs_id 3614 dfpr_yrmodsize 2014 YZF 450 for Bert dfpr_date2 7-17-20 dfpr_forktype USD DFF KYB TC Dyno Test this pg spr_rate .96   vs_spr_rate .89 dfpr_reb_1 -3 dfpr_reb_2 -3 dfpr_reb_3   -5 - -5   1 - -5   1 dfpr_reb_4 -6 dfpr_reb_5 -8 dfpr_reb_10   -19 - -19   1 - -19   1 dfpr_rebg_20 -40       r/c ratio r 10ips / c 100ips 0 0 dfpr_reb_30 -60 dfpr_reb_40   -81 - -81   1 - -81   1 dfpr_reb_50 -103 dfpr_reb_60 -126 dfpr_reb_70   -149 - -149   1 - -149   1 dfpr_id 683 dfpr_vs_id 4009 dfpr_yrmodsize 2022 KYB 350 for Alan dfpr_date2 12-15-21 dfpr_forktype USD DFF KYB-WP TC Dyno Test this pg spr_rate .96   vs_spr_rate 1.0 dfpr_reb_1 -3 dfpr_reb_2 -4 dfpr_reb_3   -5 - -5   1 - -5   1 dfpr_reb_4 -7 dfpr_reb_5 -8 dfpr_reb_10   -19 - -19   1 - -19   1 dfpr_rebg_20 -38       r/c ratio r 10ips / c 100ips 0 0 dfpr_reb_30 -58 dfpr_reb_40   -77 - -77   1 - -77   1 dfpr_reb_50 -98 dfpr_reb_60 -120 dfpr_reb_70   -142 - -142   1 - -142   1 dfpr_id 534 dfpr_vs_id 3379 dfpr_yrmodsize 2018 YZX 250 dfpr_date2 11-29-18 dfpr_forktype USD DFF KYB TC Stock Dyno this pg spr_rate .96   vs_spr_rate .88 dfpr_reb_1 -2 dfpr_reb_2 -3 dfpr_reb_3   -5 - -5   1 - -5   1 dfpr_reb_4 -6 dfpr_reb_5 -8 dfpr_reb_10   -19 - -19   1 - -19   1 dfpr_rebg_20 -38       r/c ratio r 10ips / c 100ips 0 0 dfpr_reb_30 -58 dfpr_reb_40   -79 - -79   1 - -79   1 dfpr_reb_50 -100 dfpr_reb_60 -122 dfpr_reb_70   -145 - -145   1 - -145   1 dfpr_id 639 dfpr_vs_id 3743 dfpr_yrmodsize 2020 KYB 350 for Andreas dfpr_date2 1-10-21 dfpr_forktype USD DFF KYB-WP TC Dyno Test this pg spr_rate .96   vs_spr_rate 1.02 dfpr_reb_1 -2 dfpr_reb_2 -4 dfpr_reb_3   -5 - -5   1 - -5   1 dfpr_reb_4 -6 dfpr_reb_5 -8 dfpr_reb_10   -19 - -19   1 - -19   1 dfpr_rebg_20 -40       r/c ratio r 10ips / c 100ips 0 0 dfpr_reb_30 -61 dfpr_reb_40   -82 - -82   1 - -82   1 dfpr_reb_50 -105 dfpr_reb_60 -129 dfpr_reb_70   -152 - -152   1 - -152   1 dfpr_id 721 dfpr_vs_id 3638 dfpr_yrmodsize 2017 YZX 250 Steven Shoecraft dfpr_date2 11-29-18 dfpr_forktype USD DFF KYB TC GP Spec Sheet this pg spr_rate .96   vs_spr_rate .88 dfpr_reb_1 -2 dfpr_reb_2 -3 dfpr_reb_3   -5 - -5   1 - -5   1 dfpr_reb_4 -6 dfpr_reb_5 -8 dfpr_reb_10   -19 - -19   1 - -19   1 dfpr_rebg_20 -38       r/c ratio r 10ips / c 100ips 0 0 dfpr_reb_30 -58 dfpr_reb_40   -79 - -79   1 - -79   1 dfpr_reb_50 -100 dfpr_reb_60 -122 dfpr_reb_70   -145 - -145   1 - -145   1 dfpr_id 10 dfpr_vs_id 2964 dfpr_yrmodsize 2008 YZ 250 dfpr_date2 8-15-17 dfpr_forktype USD DFF KYB TC Dyno Test this pg spr_rate .96   vs_spr_rate dfpr_reb_1 -2 dfpr_reb_2 -3 dfpr_reb_3   -5 - -5   1 - -5   1 dfpr_reb_4 -6 dfpr_reb_5 -8 dfpr_reb_10   -19 - -19   1 - -19   1 dfpr_rebg_20 -38       r/c ratio r 10ips / c 100ips 0 0 dfpr_reb_30 -58 dfpr_reb_40   -77 - -77   1 - -77   1 dfpr_reb_50 -96 dfpr_reb_60 -116 dfpr_reb_70   -135 - -135   1 - -135   1 dfpr_id 634 dfpr_vs_id 3736 dfpr_yrmodsize 2020 KYB 350 Andreas Eriksson dfpr_date2 1-7-21 dfpr_forktype USD DFF KYB-WP TC GP Spec Sheet this pg spr_rate .96   vs_spr_rate 1.02 dfpr_reb_1 -3 dfpr_reb_2 -4 dfpr_reb_3   -6 - -6   1 - -6   1 dfpr_reb_4 -7 dfpr_reb_5 -9 dfpr_reb_10   -19 - -19   1 - -19   1 dfpr_rebg_20 -40       r/c ratio r 10ips / c 100ips 0 0 dfpr_reb_30 -61 dfpr_reb_40   -83 - -83   1 - -83   1 dfpr_reb_50 -105 dfpr_reb_60 -129 dfpr_reb_70   -151 - -151   1 - -151   1 dfpr_id 640 dfpr_vs_id 3744 dfpr_yrmodsize 2020 KYB 350 Andreas Eriksson dfpr_date2 1-11-21 dfpr_forktype USD DFF KYB-WP TC GP Spec Sheet this pg spr_rate .96   vs_spr_rate 1.02 dfpr_reb_1 -2 dfpr_reb_2 -4 dfpr_reb_3   -5 - -5   1 - -5   1 dfpr_reb_4 -7 dfpr_reb_5 -8 dfpr_reb_10   -19 - -19   1 - -19   1 dfpr_rebg_20 -40       r/c ratio r 10ips / c 100ips 0 0 dfpr_reb_30 -62 dfpr_reb_40   -83 - -83   1 - -83   1 dfpr_reb_50 -106 dfpr_reb_60 -129 dfpr_reb_70   -153 - -153   1 - -153   1 dfpr_id 593 dfpr_vs_id 3582 dfpr_yrmodsize 2020 SEF F 300 dfpr_date2 3-2-20 dfpr_forktype USD DFF KYB TC Stock Dyno this pg spr_rate .96   vs_spr_rate .86 dfpr_reb_1 -3 dfpr_reb_2 -4 dfpr_reb_3   -5 - -5   1 - -5   1 dfpr_reb_4 -7 dfpr_reb_5 -9 dfpr_reb_10   -19 - -19   1 - -19   1 dfpr_rebg_20 -40       r/c ratio r 10ips / c 100ips 0 0 dfpr_reb_30 -61 dfpr_reb_40   -81 - -81   1 - -81   1 dfpr_reb_50 -103 dfpr_reb_60 -126 dfpr_reb_70   -148 - -148   1 - -148   1 dfpr_id 641 dfpr_vs_id 3745 dfpr_yrmodsize 2020 KYB 350 dfpr_date2 1-13-21 dfpr_forktype USD DFF KYB-WP TC Dyno Test this pg spr_rate .96   vs_spr_rate .94 dfpr_reb_1 -3 dfpr_reb_2 -4 dfpr_reb_3   -5 - -5   1 - -5   1 dfpr_reb_4 -7 dfpr_reb_5 -9 dfpr_reb_10   -19 - -19   1 - -19   1 dfpr_rebg_20 -40       r/c ratio r 10ips / c 100ips 0 0 dfpr_reb_30 -61 dfpr_reb_40   -83 - -83   1 - -83   1 dfpr_reb_50 -107 dfpr_reb_60 -131 dfpr_reb_70   -156 - -156   1 - -156   1 dfpr_id 633 dfpr_vs_id 3738 dfpr_yrmodsize 2020 KYB 350 for Andreas dfpr_date2 1-7-21 dfpr_forktype USD DFF KYB-WP TC Dyno Test this pg spr_rate .96   vs_spr_rate 1.02 dfpr_reb_1 -2 dfpr_reb_2 -3 dfpr_reb_3   -5 - -5   1 - -5   1 dfpr_reb_4 -6 dfpr_reb_5 -8 dfpr_reb_10   -19 - -19   1 - -19   1 dfpr_rebg_20 -42       r/c ratio r 10ips / c 100ips 0 0 dfpr_reb_30 -64 dfpr_reb_40   -88 - -88   1 - -88   1 dfpr_reb_50 -111 dfpr_reb_60 -136 dfpr_reb_70   -160 - -160   1 - -160   1 dfpr_id 688 dfpr_vs_id 4013 dfpr_yrmodsize 2022 KYB 350 Alan Stelzig dfpr_date2 12-15-21 dfpr_forktype USD DFF KYB-WP TC GP Spec Sheet this pg spr_rate .96   vs_spr_rate 1.0 dfpr_reb_1 -3 dfpr_reb_2 -4 dfpr_reb_3   -5 - -5   1 - -5   1 dfpr_reb_4 -7 dfpr_reb_5 -9 dfpr_reb_10   -19 - -19   1 - -19   1 dfpr_rebg_20 -42       r/c ratio r 10ips / c 100ips 0 0 dfpr_reb_30 -63 dfpr_reb_40   -86 - -86   1 - -86   1 dfpr_reb_50 -110 dfpr_reb_60 -134 dfpr_reb_70   -157 - -157   1 - -157   1 dfpr_id 613 dfpr_vs_id 3619 dfpr_yrmodsize 2019 KYB 350 for Bubba dfpr_date2 7-23-20 dfpr_forktype USD DFF KYB TC Dyno Test this pg spr_rate .96   vs_spr_rate .964 dfpr_reb_1 -3 dfpr_reb_2 -4 dfpr_reb_3   -6 - -6   1 - -6   1 dfpr_reb_4 -7 dfpr_reb_5 -9 dfpr_reb_10   -19 - -19   1 - -19   1 dfpr_rebg_20 -40       r/c ratio r 10ips / c 100ips 0 0 dfpr_reb_30 -61 dfpr_reb_40   -82 - -82   1 - -82   1 dfpr_reb_50 -104 dfpr_reb_60 -127 dfpr_reb_70   -149 - -149   1 - -149   1 dfpr_id 638 dfpr_vs_id 3742 dfpr_yrmodsize 2020 KYB 350 for Andreas dfpr_date2 1-10-21 dfpr_forktype USD DFF KYB-WP TC Dyno Test this pg spr_rate .96   vs_spr_rate 1.02 dfpr_reb_1 -2 dfpr_reb_2 -4 dfpr_reb_3   -5 - -5   1 - -5   1 dfpr_reb_4 -7 dfpr_reb_5 -8 dfpr_reb_10   -19 - -19   1 - -19   1 dfpr_rebg_20 -41       r/c ratio r 10ips / c 100ips 0 0 dfpr_reb_30 -62 dfpr_reb_40   -84 - -84   1 - -84   1 dfpr_reb_50 -107 dfpr_reb_60 -130 dfpr_reb_70   -154 - -154   1 - -154   1 dfpr_id 701 dfpr_vs_id 4074 dfpr_yrmodsize 2020 SE F 300 Sean Hilty dfpr_date2 3-18-22 dfpr_forktype USD DFF KYB TC GP Spec Sheet this pg spr_rate .96   vs_spr_rate .93 dfpr_reb_1 -4 dfpr_reb_2 -5 dfpr_reb_3   -6 - -6   1 - -6   1 dfpr_reb_4 -7 dfpr_reb_5 -9 dfpr_reb_10   -19 - -19   1 - -19   1 dfpr_rebg_20 -40       r/c ratio r 10ips / c 100ips 0 0 dfpr_reb_30 -62 dfpr_reb_40   -83 - -83   1 - -83   1 dfpr_reb_50 -104 dfpr_reb_60 -124 dfpr_reb_70   -143 - -143   1 - -143   1 dfpr_id 608 dfpr_vs_id 3612 dfpr_yrmodsize 2014 YZF 450 for Bert dfpr_date2 7-4-20 dfpr_forktype USD DFF KYB TC Dyno Test this pg spr_rate .96   vs_spr_rate .904 dfpr_reb_1 -3 dfpr_reb_2 -4 dfpr_reb_3   -5 - -5   1 - -5   1 dfpr_reb_4 -7 dfpr_reb_5 -9 dfpr_reb_10   -19 - -19   1 - -19   1 dfpr_rebg_20 -40       r/c ratio r 10ips / c 100ips 0 0 dfpr_reb_30 -61 dfpr_reb_40   -82 - -82   1 - -82   1 dfpr_reb_50 -104 dfpr_reb_60 -126 dfpr_reb_70   -147 - -147   1 - -147   1 dfpr_id 676 dfpr_vs_id 3951 dfpr_yrmodsize 2020 SEF F 450 for Connor dfpr_date2 11-6-21 dfpr_forktype USD DFF KYB TC Dyno Test this pg spr_rate .96   vs_spr_rate 1.04 dfpr_reb_1 -3 dfpr_reb_2 -4 dfpr_reb_3   -5 - -5   1 - -5   1 dfpr_reb_4 -7 dfpr_reb_5 -9 dfpr_reb_10   -20 - -20   1 - -20   1 dfpr_rebg_20 -41       r/c ratio r 10ips / c 100ips 0 0 dfpr_reb_30 -64 dfpr_reb_40   -87 - -87   1 - -87   1 dfpr_reb_50 -110 dfpr_reb_60 -133 dfpr_reb_70   -155 - -155   1 - -155   1 dfpr_id 615 dfpr_vs_id 3621 dfpr_yrmodsize 2019 KYB 350 Bubba Henry dfpr_date2 7-20-20 dfpr_forktype USD DFF KYB TC GP Spec Sheet this pg spr_rate .96   vs_spr_rate .972 dfpr_reb_1 -3 dfpr_reb_2 -4 dfpr_reb_3   -6 - -6   1 - -6   1 dfpr_reb_4 -7 dfpr_reb_5 -9 dfpr_reb_10   -20 - -20   1 - -20   1 dfpr_rebg_20 -41       r/c ratio r 10ips / c 100ips 0 0 dfpr_reb_30 -62 dfpr_reb_40   -82 - -82   1 - -82   1 dfpr_reb_50 -104 dfpr_reb_60 -127 dfpr_reb_70   -149 - -149   1 - -149   1 dfpr_id 13 dfpr_vs_id 2960 dfpr_yrmodsize 2008 YZ 250 dfpr_date2 8-10-17 dfpr_forktype USD DFF KYB TC Dyno Test this pg spr_rate .96   vs_spr_rate dfpr_reb_1 -4 dfpr_reb_2 -5 dfpr_reb_3   -7 - -7   1 - -7   1 dfpr_reb_4 -9 dfpr_reb_5 -11 dfpr_reb_10   -20 - -20   1 - -20   1 dfpr_rebg_20 -37       r/c ratio r 10ips / c 100ips 0 0 dfpr_reb_30 -55 dfpr_reb_40   -73 - -73   1 - -73   1 dfpr_reb_50 -92 dfpr_reb_60 -111 dfpr_reb_70   -130 - -130   1 - -130   1 dfpr_id 764 dfpr_vs_id 4259 dfpr_yrmodsize 2023 SE F 125 for Porter dfpr_date2 9-2-24 dfpr_forktype USD DFF KYB TC Stock Dyno this pg spr_rate .96   vs_spr_rate .82 dfpr_reb_1 -3 dfpr_reb_2 -4 dfpr_reb_3   -5 - -5   1 - -5   1 dfpr_reb_4 -7 dfpr_reb_5 -9 dfpr_reb_10   -20 - -20   1 - -20   1 dfpr_rebg_20 -40       r/c ratio r 10ips / c 100ips 0 0 dfpr_reb_30 -60 dfpr_reb_40   -81 - -81   1 - -81   1 dfpr_reb_50 -103 dfpr_reb_60 -125 dfpr_reb_70   -147 - -147   1 - -147   1 dfpr_id 686 dfpr_vs_id 4012 dfpr_yrmodsize 2022 KYB 350 Alan Stelzig dfpr_date2 12-15-21 dfpr_forktype USD DFF KYB-WP TC Dyno Test this pg spr_rate .96   vs_spr_rate 1.0 dfpr_reb_1 -3 dfpr_reb_2 -4 dfpr_reb_3   -5 - -5   1 - -5   1 dfpr_reb_4 -7 dfpr_reb_5 -9 dfpr_reb_10   -20 - -20   1 - -20   1 dfpr_rebg_20 -42       r/c ratio r 10ips / c 100ips 0 0 dfpr_reb_30 -64 dfpr_reb_40   -86 - -86   1 - -86   1 dfpr_reb_50 -111 dfpr_reb_60 -135 dfpr_reb_70   -158 - -158   1 - -158   1 dfpr_id 636 dfpr_vs_id 3740 dfpr_yrmodsize 2020 KYB 350 for Andreas dfpr_date2 1-9-21 dfpr_forktype USD DFF KYB-WP TC Dyno Test this pg spr_rate .96   vs_spr_rate 1.02 dfpr_reb_1 -2 dfpr_reb_2 -4 dfpr_reb_3   -5 - -5   1 - -5   1 dfpr_reb_4 -7 dfpr_reb_5 -9 dfpr_reb_10   -20 - -20   1 - -20   1 dfpr_rebg_20 -42       r/c ratio r 10ips / c 100ips 0 0 dfpr_reb_30 -64 dfpr_reb_40   -87 - -87   1 - -87   1 dfpr_reb_50 -111 dfpr_reb_60 -135 dfpr_reb_70   -160 - -160   1 - -160   1 dfpr_id 12 dfpr_vs_id 2961 dfpr_yrmodsize 2008 YZ 250 dfpr_date2 8-10-17 dfpr_forktype USD DFF KYB TC Dyno Test this pg spr_rate .96   vs_spr_rate dfpr_reb_1 -3 dfpr_reb_2 -5 dfpr_reb_3   -6 - -6   1 - -6   1 dfpr_reb_4 -8 dfpr_reb_5 -10 dfpr_reb_10   -20 - -20   1 - -20   1 dfpr_rebg_20 -40       r/c ratio r 10ips / c 100ips 0 0 dfpr_reb_30 -59 dfpr_reb_40   -78 - -78   1 - -78   1 dfpr_reb_50 -97 dfpr_reb_60 -117 dfpr_reb_70   -136 - -136   1 - -136   1 dfpr_id 700 dfpr_vs_id 4073 dfpr_yrmodsize 2020 SE F 300 for Sean Hilty dfpr_date2 3-18-22 dfpr_forktype USD DFF KYB TC Dyno Test this pg spr_rate .96   vs_spr_rate .93 dfpr_reb_1 -3 dfpr_reb_2 -4 dfpr_reb_3   -6 - -6   1 - -6   1 dfpr_reb_4 -7 dfpr_reb_5 -9 dfpr_reb_10   -21 - -21   1 - -21   1 dfpr_rebg_20 -43       r/c ratio r 10ips / c 100ips 0 0 dfpr_reb_30 -66 dfpr_reb_40   -89 - -89   1 - -89   1 dfpr_reb_50 -112 dfpr_reb_60 -134 dfpr_reb_70   -156 - -156   1 - -156   1 dfpr_id 684 dfpr_vs_id 4010 dfpr_yrmodsize 2022 KYB 350 for Alan dfpr_date2 12-15-21 dfpr_forktype USD DFF KYB-WP TC Dyno Test this pg spr_rate .96   vs_spr_rate 1.0 dfpr_reb_1 -3 dfpr_reb_2 -4 dfpr_reb_3   -6 - -6   1 - -6   1 dfpr_reb_4 -7 dfpr_reb_5 -9 dfpr_reb_10   -21 - -21   1 - -21   1 dfpr_rebg_20 -43       r/c ratio r 10ips / c 100ips 0 0 dfpr_reb_30 -65 dfpr_reb_40   -87 - -87   1 - -87   1 dfpr_reb_50 -111 dfpr_reb_60 -135 dfpr_reb_70   -157 - -157   1 - -157   1 dfpr_id 612 dfpr_vs_id 3618 dfpr_yrmodsize 2019 KYB 350 for Bubba dfpr_date2 7-20-20 dfpr_forktype USD DFF KYB TC Dyno Test this pg spr_rate .96   vs_spr_rate .972 dfpr_reb_1 -3 dfpr_reb_2 -4 dfpr_reb_3   -5 - -5   1 - -5   1 dfpr_reb_4 -7 dfpr_reb_5 -9 dfpr_reb_10   -21 - -21   1 - -21   1 dfpr_rebg_20 -43       r/c ratio r 10ips / c 100ips 0 0 dfpr_reb_30 -63 dfpr_reb_40   -85 - -85   1 - -85   1 dfpr_reb_50 -109 dfpr_reb_60 -132 dfpr_reb_70   -156 - -156   1 - -156   1 dfpr_id 630 dfpr_vs_id 3735 dfpr_yrmodsize 2020 KYB 350 for Andreas dfpr_date2 1-7-21 dfpr_forktype USD DFF KYB-WP TC Dyno Test this pg spr_rate .96   vs_spr_rate 1.02 dfpr_reb_1 -3 dfpr_reb_2 -4 dfpr_reb_3   -6 - -6   1 - -6   1 dfpr_reb_4 -7 dfpr_reb_5 -9 dfpr_reb_10   -21 - -21   1 - -21   1 dfpr_rebg_20 -43       r/c ratio r 10ips / c 100ips 0 0 dfpr_reb_30 -66 dfpr_reb_40   -89 - -89   1 - -89   1 dfpr_reb_50 -113 dfpr_reb_60 -138 dfpr_reb_70   -162 - -162   1 - -162   1 dfpr_id 668 dfpr_vs_id 3882 dfpr_yrmodsize 2020 SEF F 450 for Connor dfpr_date2 8-16-21 dfpr_forktype USD DFF KYB TC Dyno Test this pg spr_rate .96   vs_spr_rate .926 dfpr_reb_1 -4 dfpr_reb_2 -5 dfpr_reb_3   -6 - -6   1 - -6   1 dfpr_reb_4 -7 dfpr_reb_5 -10 dfpr_reb_10   -21 - -21   1 - -21   1 dfpr_rebg_20 -43       r/c ratio r 10ips / c 100ips 0 0 dfpr_reb_30 -65 dfpr_reb_40   -86 - -86   1 - -86   1 dfpr_reb_50 -107 dfpr_reb_60 -129 dfpr_reb_70   -153 - -153   1 - -153   1 dfpr_id 614 dfpr_vs_id 3620 dfpr_yrmodsize 2019 KYB 350 for Bubba dfpr_date2 7-23-20 dfpr_forktype USD DFF KYB TC Dyno Test this pg spr_rate .96   vs_spr_rate .972 dfpr_reb_1 -4 dfpr_reb_2 -5 dfpr_reb_3   -7 - -7   1 - -7   1 dfpr_reb_4 -8 dfpr_reb_5 -10 dfpr_reb_10   -21 - -21   1 - -21   1 dfpr_rebg_20 -43       r/c ratio r 10ips / c 100ips 0 0 dfpr_reb_30 -64 dfpr_reb_40   -84 - -84   1 - -84   1 dfpr_reb_50 -105 dfpr_reb_60 -127 dfpr_reb_70   -150 - -150   1 - -150   1 dfpr_id 625 dfpr_vs_id 3705 dfpr_yrmodsize 2020 KYB 350 dfpr_date2 12-19-20 dfpr_forktype USD DFF KYB-WP TC Mod Valving this pg spr_rate .96   vs_spr_rate dfpr_reb_1 -4 dfpr_reb_2 -5 dfpr_reb_3   -7 - -7   1 - -7   1 dfpr_reb_4 -8 dfpr_reb_5 -10 dfpr_reb_10   -21 - -21   1 - -21   1 dfpr_rebg_20 -43       r/c ratio r 10ips / c 100ips 0 0 dfpr_reb_30 -64 dfpr_reb_40   -84 - -84   1 - -84   1 dfpr_reb_50 -105 dfpr_reb_60 -127 dfpr_reb_70   -150 - -150   1 - -150   1 dfpr_id 9 dfpr_vs_id 2965 dfpr_yrmodsize 2008 YZ 250 dfpr_date2 8-15-17 dfpr_forktype USD DFF KYB TC Dyno Test this pg spr_rate .96   vs_spr_rate dfpr_reb_1 -3 dfpr_reb_2 -5 dfpr_reb_3   -6 - -6   1 - -6   1 dfpr_reb_4 -8 dfpr_reb_5 -10 dfpr_reb_10   -21 - -21   1 - -21   1 dfpr_rebg_20 -41       r/c ratio r 10ips / c 100ips 0 0 dfpr_reb_30 -61 dfpr_reb_40   -80 - -80   1 - -80   1 dfpr_reb_50 -100 dfpr_reb_60 -119 dfpr_reb_70   -138 - -138   1 - -138   1 dfpr_id 642 dfpr_vs_id 3746 dfpr_yrmodsize 2020 KYB 350 dfpr_date2 1-18-21 dfpr_forktype USD DFF KYB-WP TC Dyno Test this pg spr_rate .96   vs_spr_rate .94 dfpr_reb_1 -3 dfpr_reb_2 -4 dfpr_reb_3   -6 - -6   1 - -6   1 dfpr_reb_4 -7 dfpr_reb_5 -10 dfpr_reb_10   -21 - -21   1 - -21   1 dfpr_rebg_20 -44       r/c ratio r 10ips / c 100ips 0 0 dfpr_reb_30 -66 dfpr_reb_40   -89 - -89   1 - -89   1 dfpr_reb_50 -112 dfpr_reb_60 -136 dfpr_reb_70   -159 - -159   1 - -159   1 dfpr_id 679 dfpr_vs_id 3954 dfpr_yrmodsize 2020 SEF F 450 Connor tested dfpr_date2 11-7-21 dfpr_forktype USD DFF KYB TC GP Spec Sheet this pg spr_rate .96   vs_spr_rate 1.02 dfpr_reb_1 -3 dfpr_reb_2 -4 dfpr_reb_3   -6 - -6   1 - -6   1 dfpr_reb_4 -8 dfpr_reb_5 -10 dfpr_reb_10   -21 - -21   1 - -21   1 dfpr_rebg_20 -43       r/c ratio r 10ips / c 100ips 0 0 dfpr_reb_30 -64 dfpr_reb_40   -85 - -85   1 - -85   1 dfpr_reb_50 -107 dfpr_reb_60 -129 dfpr_reb_70   -152 - -152   1 - -152   1 dfpr_id 765 dfpr_vs_id 4260 dfpr_yrmodsize 2023 SE F 125 for Porter dfpr_date2 9-2-24 dfpr_forktype USD DFF KYB TC Dyno Test this pg spr_rate .96   vs_spr_rate .72 dfpr_reb_1 -3 dfpr_reb_2 -4 dfpr_reb_3   -6 - -6   1 - -6   1 dfpr_reb_4 -7 dfpr_reb_5 -10 dfpr_reb_10   -21 - -21   1 - -21   1 dfpr_rebg_20 -43       r/c ratio r 10ips / c 100ips 0 0 dfpr_reb_30 -64 dfpr_reb_40   -85 - -85   1 - -85   1 dfpr_reb_50 -107 dfpr_reb_60 -130 dfpr_reb_70   -153 - -153   1 - -153   1 dfpr_id 89 dfpr_vs_id 2695 dfpr_yrmodsize 2011 KXF 450 dfpr_date2 2-6-17 dfpr_forktype USD DFF KYB TC Dyno Test this pg spr_rate .96   vs_spr_rate dfpr_reb_1 -2 dfpr_reb_2 -3 dfpr_reb_3   -5 - -5   1 - -5   1 dfpr_reb_4 -7 dfpr_reb_5 -9 dfpr_reb_10   -22 - -22   1 - -22   1 dfpr_rebg_20 -49       r/c ratio r 10ips / c 100ips 0 0 dfpr_reb_30 -76 dfpr_reb_40   -105 - -105   1 - -105   1 dfpr_reb_50 -133 dfpr_reb_60 -160 dfpr_reb_70   -187 - -187   1 - -187   1 dfpr_id 629 dfpr_vs_id 3710 dfpr_yrmodsize 2020 KYB 350 Andreas Eriksson dfpr_date2 12-27-20 dfpr_forktype USD DFF KYB-WP TC Dyno Test this pg spr_rate .96   vs_spr_rate 1.02 dfpr_reb_1 -3 dfpr_reb_2 -4 dfpr_reb_3   -5 - -5   1 - -5   1 dfpr_reb_4 -7 dfpr_reb_5 -9 dfpr_reb_10   -22 - -22   1 - -22   1 dfpr_rebg_20 -46       r/c ratio r 10ips / c 100ips 0 0 dfpr_reb_30 -69 dfpr_reb_40   -93 - -93   1 - -93   1 dfpr_reb_50 -119 dfpr_reb_60 -144 dfpr_reb_70   -167 - -167   1 - -167   1 dfpr_id 667 dfpr_vs_id 3881 dfpr_yrmodsize 2020 SEF F 450 for Connor dfpr_date2 8-15-21 dfpr_forktype USD DFF KYB TC Dyno Test this pg spr_rate .96   vs_spr_rate .96 dfpr_reb_1 -4 dfpr_reb_2 -5 dfpr_reb_3   -6 - -6   1 - -6   1 dfpr_reb_4 -8 dfpr_reb_5 -10 dfpr_reb_10   -22 - -22   1 - -22   1 dfpr_rebg_20 -42       r/c ratio r 10ips / c 100ips 0 0 dfpr_reb_30 -62 dfpr_reb_40   -82 - -82   1 - -82   1 dfpr_reb_50 -103 dfpr_reb_60 -126 dfpr_reb_70   -148 - -148   1 - -148   1 dfpr_id 669 dfpr_vs_id 3883 dfpr_yrmodsize 2020 SEF F 450 Connor Addy dfpr_date2 8-16-21 dfpr_forktype USD DFF KYB TC GP Spec Sheet this pg spr_rate .96   vs_spr_rate .94 dfpr_reb_1 -4 dfpr_reb_2 -5 dfpr_reb_3   -7 - -7   1 - -7   1 dfpr_reb_4 -8 dfpr_reb_5 -10 dfpr_reb_10   -22 - -22   1 - -22   1 dfpr_rebg_20 -43       r/c ratio r 10ips / c 100ips 0 0 dfpr_reb_30 -64 dfpr_reb_40   -84 - -84   1 - -84   1 dfpr_reb_50 -105 dfpr_reb_60 -128 dfpr_reb_70   -151 - -151   1 - -151   1 dfpr_id 632 dfpr_vs_id 3737 dfpr_yrmodsize 2020 KYB 350 for Andreas dfpr_date2 1-7-21 dfpr_forktype USD DFF KYB-WP TC Dyno Test this pg spr_rate .96   vs_spr_rate 1.02 dfpr_reb_1 -3 dfpr_reb_2 -4 dfpr_reb_3   -6 - -6   1 - -6   1 dfpr_reb_4 -7 dfpr_reb_5 -9 dfpr_reb_10   -22 - -22   1 - -22   1 dfpr_rebg_20 -47       r/c ratio r 10ips / c 100ips 0 0 dfpr_reb_30 -70 dfpr_reb_40   -95 - -95   1 - -95   1 dfpr_reb_50 -121 dfpr_reb_60 -146 dfpr_reb_70   -170 - -170   1 - -170   1 dfpr_id 678 dfpr_vs_id 3953 dfpr_yrmodsize 2020 SEF F 450 for Connor dfpr_date2 11-7-21 dfpr_forktype USD DFF KYB TC Dyno Test this pg spr_rate .96   vs_spr_rate 1.04 dfpr_reb_1 -3 dfpr_reb_2 -4 dfpr_reb_3   -6 - -6   1 - -6   1 dfpr_reb_4 -8 dfpr_reb_5 -10 dfpr_reb_10   -22 - -22   1 - -22   1 dfpr_rebg_20 -44       r/c ratio r 10ips / c 100ips 0 0 dfpr_reb_30 -66 dfpr_reb_40   -87 - -87   1 - -87   1 dfpr_reb_50 -109 dfpr_reb_60 -132 dfpr_reb_70   -154 - -154   1 - -154   1 dfpr_id 681 dfpr_vs_id 3956 dfpr_yrmodsize 2020 SEF F 450 Connor tested dfpr_date2 dfpr_forktype USD DFF KYB TC GP Spec Sheet this pg spr_rate .96   vs_spr_rate 1.02 dfpr_reb_1 -3 dfpr_reb_2 -4 dfpr_reb_3   -6 - -6   1 - -6   1 dfpr_reb_4 -8 dfpr_reb_5 -10 dfpr_reb_10   -22 - -22   1 - -22   1 dfpr_rebg_20 -44       r/c ratio r 10ips / c 100ips 0 0 dfpr_reb_30 -65 dfpr_reb_40   -86 - -86   1 - -86   1 dfpr_reb_50 -108 dfpr_reb_60 -130 dfpr_reb_70   -152 - -152   1 - -152   1 dfpr_id 677 dfpr_vs_id 3952 dfpr_yrmodsize 2020 SEF F 450 for Connor dfpr_date2 11-7-21 dfpr_forktype USD DFF KYB TC Dyno Test this pg spr_rate .96   vs_spr_rate 1.04 dfpr_reb_1 -3 dfpr_reb_2 -4 dfpr_reb_3   -6 - -6   1 - -6   1 dfpr_reb_4 -8 dfpr_reb_5 -10 dfpr_reb_10   -22 - -22   1 - -22   1 dfpr_rebg_20 -44       r/c ratio r 10ips / c 100ips 0 0 dfpr_reb_30 -66 dfpr_reb_40   -87 - -87   1 - -87   1 dfpr_reb_50 -110 dfpr_reb_60 -133 dfpr_reb_70   -155 - -155   1 - -155   1 dfpr_id 87 dfpr_vs_id 2698 dfpr_yrmodsize 2011 KXF 450 dfpr_date2 2-6-17 dfpr_forktype USD DFF KYB TC Dyno Test this pg spr_rate .96   vs_spr_rate dfpr_reb_1 -2 dfpr_reb_2 -3 dfpr_reb_3   -5 - -5   1 - -5   1 dfpr_reb_4 -7 dfpr_reb_5 -9 dfpr_reb_10   -23 - -23   1 - -23   1 dfpr_rebg_20 -50       r/c ratio r 10ips / c 100ips 0 0 dfpr_reb_30 -76 dfpr_reb_40   -105 - -105   1 - -105   1 dfpr_reb_50 -133 dfpr_reb_60 -160 dfpr_reb_70   -186 - -186   1 - -186   1 dfpr_id 680 dfpr_vs_id 3955 dfpr_yrmodsize 2020 SEF F 450 Connor tested dfpr_date2 11-8-21 dfpr_forktype USD DFF KYB TC GP Spec Sheet this pg spr_rate .96   vs_spr_rate 1.052 dfpr_reb_1 -3 dfpr_reb_2 -5 dfpr_reb_3   -7 - -7   1 - -7   1 dfpr_reb_4 -9 dfpr_reb_5 -11 dfpr_reb_10   -23 - -23   1 - -23   1 dfpr_rebg_20 -45       r/c ratio r 10ips / c 100ips 0 0 dfpr_reb_30 -67 dfpr_reb_40   -88 - -88   1 - -88   1 dfpr_reb_50 -110 dfpr_reb_60 -130 dfpr_reb_70   -152 - -152   1 - -152   1 dfpr_id 88 dfpr_vs_id 2696 dfpr_yrmodsize 2011 KXF 450 dfpr_date2 2-6-17 dfpr_forktype USD DFF KYB TC Dyno Test this pg spr_rate .96   vs_spr_rate dfpr_reb_1 -2 dfpr_reb_2 -3 dfpr_reb_3   -5 - -5   1 - -5   1 dfpr_reb_4 -7 dfpr_reb_5 -9 dfpr_reb_10   -23 - -23   1 - -23   1 dfpr_rebg_20 -51       r/c ratio r 10ips / c 100ips 0 0 dfpr_reb_30 -77 dfpr_reb_40   -105 - -105   1 - -105   1 dfpr_reb_50 -133 dfpr_reb_60 -160 dfpr_reb_70   -186 - -186   1 - -186   1 dfpr_id 90 dfpr_vs_id 2694 dfpr_yrmodsize 2011 KXF 450 dfpr_date2 2-5-17 dfpr_forktype USD DFF KYB TC Dyno Test this pg spr_rate .96   vs_spr_rate dfpr_reb_1 -2 dfpr_reb_2 -3 dfpr_reb_3   -5 - -5   1 - -5   1 dfpr_reb_4 -7 dfpr_reb_5 -10 dfpr_reb_10   -23 - -23   1 - -23   1 dfpr_rebg_20 -50       r/c ratio r 10ips / c 100ips 0 0 dfpr_reb_30 -76 dfpr_reb_40   -104 - -104   1 - -104   1 dfpr_reb_50 -132 dfpr_reb_60 -159 dfpr_reb_70   -186 - -186   1 - -186   1 dfpr_id 86 dfpr_vs_id 2699 dfpr_yrmodsize 2011 KXF 450 Steve Starnes dfpr_date2 2-6-17 dfpr_forktype USD DFF KYB TC GP Spec Sheet this pg spr_rate .96   vs_spr_rate dfpr_reb_1 -2 dfpr_reb_2 -3 dfpr_reb_3   -5 - -5   1 - -5   1 dfpr_reb_4 -7 dfpr_reb_5 -9 dfpr_reb_10   -24 - -24   1 - -24   1 dfpr_rebg_20 -51       r/c ratio r 10ips / c 100ips 0 0 dfpr_reb_30 -77 dfpr_reb_40   -105 - -105   1 - -105   1 dfpr_reb_50 -134 dfpr_reb_60 -161 dfpr_reb_70   -188 - -188   1 - -188   1 dfpr_id 675 dfpr_vs_id 3950 dfpr_yrmodsize 2020 SEF F 450 for Connor dfpr_date2 11-5-21 dfpr_forktype USD DFF KYB TC Dyno Test this pg spr_rate .96   vs_spr_rate 1.04 dfpr_reb_1 -3 dfpr_reb_2 -4 dfpr_reb_3   -6 - -6   1 - -6   1 dfpr_reb_4 -8 dfpr_reb_5 -11 dfpr_reb_10   -24 - -24   1 - -24   1 dfpr_rebg_20 -48       r/c ratio r 10ips / c 100ips 0 0 dfpr_reb_30 -72 dfpr_reb_40   -96 - -96   1 - -96   1 dfpr_reb_50 -120 dfpr_reb_60 -144 dfpr_reb_70   -168 - -168   1 - -168   1 dfpr_id 91 dfpr_vs_id 2693 dfpr_yrmodsize 2011 KXF 450 dfpr_date2 2-5-17 dfpr_forktype USD DFF KYB TC Dyno Test this pg spr_rate .96   vs_spr_rate dfpr_reb_1 -2 dfpr_reb_2 -4 dfpr_reb_3   -5 - -5   1 - -5   1 dfpr_reb_4 -7 dfpr_reb_5 -10 dfpr_reb_10   -24 - -24   1 - -24   1 dfpr_rebg_20 -52       r/c ratio r 10ips / c 100ips 0 0 dfpr_reb_30 -79 dfpr_reb_40   -107 - -107   1 - -107   1 dfpr_reb_50 -136 dfpr_reb_60 -163 dfpr_reb_70   -189 - -189   1 - -189   1 dfpr_id 607 dfpr_vs_id 3611 dfpr_yrmodsize 2014 YZF 450 for Bert dfpr_date2 7-3-20 dfpr_forktype USD DFF KYB TC Dyno Test this pg spr_rate .96   vs_spr_rate .904 dfpr_reb_1 -3 dfpr_reb_2 -4 dfpr_reb_3   -7 - -7   1 - -7   1 dfpr_reb_4 -9 dfpr_reb_5 -11 dfpr_reb_10   -25 - -25   1 - -25   1 dfpr_rebg_20 -49       r/c ratio r 10ips / c 100ips 0 0 dfpr_reb_30 -72 dfpr_reb_40   -95 - -95   1 - -95   1 dfpr_reb_50 -120 dfpr_reb_60 -144 dfpr_reb_70   -167 - -167   1 - -167   1 dfpr_id 92 dfpr_vs_id 2692 dfpr_yrmodsize 2011 KXF 450 dfpr_date2 2-2-17 dfpr_forktype USD DFF KYB TC Stock Dyno this pg spr_rate .96   vs_spr_rate dfpr_reb_1 -3 dfpr_reb_2 -4 dfpr_reb_3   -5 - -5   1 - -5   1 dfpr_reb_4 -7 dfpr_reb_5 -10 dfpr_reb_10   -26 - -26   1 - -26   1 dfpr_rebg_20 -61       r/c ratio r 10ips / c 100ips 0 0 dfpr_reb_30 -94 dfpr_reb_40   -135 - -135   1 - -135   1 dfpr_reb_50 -177 dfpr_reb_60 -214 dfpr_reb_70   -252 - -252   1 - -252   1

5-4-23  Use .47 x 2 = .94 kg fk spr for all comparisons (we were using .96).  However, this small change is spring rate is minimal and only changes reb force by .20 lbs     .96 kg = -19.2     .94 kg = -19.0    So if we forget to change it somewhere it won't make that much difference. We compute dyno rebound force and reverse engineered rebound force using r-zeta values throughout the dyno test velocity range. e.g.  1ips, 2ips, 3ips, 4ips . . . 70ips r-zeta was intended to be .70 throughout the range.  However, we found that zeta values at 1-5 ips will always be higher due to fork seal and bushing drag.  This phenomena is found on all forks and is inherent in the mv piston design and shim stack configurations.  It's physically impossible to get reb force and r-zeta down at 1-5ips without major tweaking and manipulation that goes far beyond the norm. We dyno and pressure test the fork cartridge and the dyno numbers have cartridge drag, but no seal or bushing drag. To compensate we add 2.5 lbs drag force to each fork leg before computing zeta. Example of .70 r-zeta from 1-70ips.  - It's accepted that zeta is high at 1-5ips.  Usually by 10-20ips r-zeta is closer to the desired .70. - We have created rebound targets that account for seal drag. Example of .70 r-zeta vs. target   .52-.70s. - The first number in the target is nondescript and simply indicates r-zeta is less at 1-10ips.  The lower the number the greater the reduction in the zeta value. Sample r-zeta targets. .52-.70s     .34-.70s     .48-.65s     .30-65s     .48-60s     .33-60s - A rocks and roots Enduro setup may work better if rebound is faster at 20ips to work the chop, then is slower at full stroke velocities of 70ips to keep the bike stable. Targets  .50-.70  and  .55-.70  dips in the middle. Use the r-zeta factor to to adjust values as needed. For example, target .50-.70 x .90 gives zeta values of .54 at 20ips and .64 at 70ips. - CONCLUSION It's definately an advantage to have a preconceived idea of rebound before building the fork.  With experience, the targets allow you to choose the best 'current thinking' rebound for each application.  Then adjust as needed.