Shock Cadj Percent [ca%] Shock  ca% ca% = (ca force / c force) The compression forces are split between the shock mv and cadj piston. 'c force' and 'ca force' The amount of work done by each can be determined by ca%. The table on the right shows how the 'shock ca% target value' is calculated.  shaft area / (pist area - shaft area) In this case ca% calculates to 11.4%.  Pressure testing allows us to split the shock compression forces into: how much from the main piston  (c force) how much from the cadj piston  (ca force) Using ca% target, for any given velocity, ca force should be 11.4% of c force.   ca% can be used to determine if the shock fluid is foaming or cavitating. Shock ca% target value =  shaft area / (pist area - shaft area) ca% for 2011 KXF 250 shaft dia = 16mm       shaft area = 201.06 mm2 pist dia = 50mm         pist area = 1963.50 mm2 pist area - shaft area = 1762.44 mm2 ca% target value is   (201.06 / 1762.44) = .114      11.4% To determine the ca% of a dyno test: ca% = (ca force / c force)