Discussion Starter · #1 ·
I have a 2001 400EX it's got a completely brand new head new piston new cylinder freshly rebuilt stock bore with less than 2 hours on rebuild brand new heavy duty timing chain guides and tensioner. I have adjusted the valves four or five different times and still I have a ticking sound I can't hear it at idle I can only hear it when I rev the engine! It seems to run good with plenty of power I've got a 42 pilot jet and a 170 main jet big gun exhaust two holes in the airbox lid. Crankshaft had minimal place side to side and zero play up and down. I am clueless to what this is but it doesn't seem like the normal Honda tick just need some advice on what to check or what to do.