Originally Posted by
bobbyblaze
when i got my JPX.21 the first thing i did was took the head off take one shim out because i'm running 20%, ok now 3gallons into engine decided to to clean it up, i notice it was two shims stuck together my question is how many shims should i run or is it was a mistake that ofna put 3shims on the motor?
they usually come with 3 shims, 2 thick, one thin.....