pitkendall
04-18-2010, 05:53 PM
i have a ? for you guys more experienced with the z400 i did a compression test the way it should be done warmed bike up then pulled plug held throttle wide open and hit the button till the needle stoped moving well mine was only at 120 psi and the book says it should be at 142 but my bike runs great starts easy no problems at all heres my ? at what psi do u guys re ring or put a new piston in thanks