I am planning on rebuilding my top end soon but I don't have a manual. I ordered one from the dealer yesterday but it won't be here for 7-10 days (sure it will!).
I bought a Wiseco piston but I don't know what the ring gap should be. Can anyone help?
The Wiseco piston should come with a yellow sheet that gives the minimum ring end gap. Mine (#750P4) says it should be at least 0.012". With new rings and a newly bored (225cc) and plated cylinder mine measured 0.015". That's what I've recorded as a baseline. Eric Gorr's book says the max gap should be in the 0.018 - 0.025 in. The KDX shop manual says the OEM max service limit is 0.026 in.