mv pist mfg - for showa
  Showa now has four different mv pistons.
 
  Description of terms
  - tri = port is more triangular shaped
  - trap = port is shaped trapazoid shaped
  - 20 = face shim dia
  - 55bld = bleed hole equal in size to a #55 drill bit
 
  tri20_55bld
   - common on 07 and older
  trap20_55bldT
   - 08 CRF
  trap18_53bld
   - somewhere around 08 - 09 KXF 250
  trap18_0bld
   - start 10 KXF 250
   
 
pict of mv pist below
  tri20_55bld
   - common on 07 and older
 
  trap20_55bldT
   - 08 CRF
 
  trap18_53bld
   - somewhere around 08 - 09 KXF 250
 
  trap18_0bld
   - start 10 KXF 250