i've pulled my 850 mk2 almost to pieces trying to find a very loud "clunk" when the engine turns over. i believe its the contact between the follower and the cam on the exhaust. apparently its a 4S cam in there but i dont know how to confirm this. Has anyone with 4s cams in their bike able to confirm that this clunk is normal? it seems to happen when the piston on the exhaust stroke is about 8mm from the top of the barrel.
Cheers
Andy
Cheers
Andy