rd2005
01-13-2013, 08:47 PM
Im trying to help out a friend he has an 90 apex 2010 and he put a malossi head on about 2 months ago and he is replacing the pistion what comp should it have the motor is still a stocker and he is running a slipper sprocket. The comp test he is getting about 83 psi. My apex s are way diffrent than his so Im not sure my self, any help would great