Reply To: Valve clearance, camshaft, camshaft tensioner – a problem or a serious fault?
I noticed that too, but it happens in UK too. Owners mix cylinders (eg. Front engine use 2016 cylinder with updated tensioner and rear cylinder use 2003 cylinder that uses Generation 1 tensioner)
Oh i see. So your Front Cylinder is from an EFI (Electronic Fuel Injection) bike. Which means theres a HOLE in the FRONT CYLINDER that runs down from the HEAD & out the lower/rear of the Cylinder. It is for measuring GASSES but your carby bike won’t measure them. Have you plugged this hole? It will leak exhaust gasses if you don’t & you will lose some power – reduces the backpressure i think. I’ve been told i can plug that hole on the outside of cylinder, next to the tensioner. There’s 3 holes, the 2 on the outside are for screws, the inside hole is exhaust gas. Luckily i found an old cylinder for my carby bike so i didn’t need to buy an EFI cylinder & different cam chain tensioner & different tensioner gasket.
If your bike was running better before the valve clearance and NEW shims were put in, i’d put the old shims back in.
I’d also check the manual for the TORQUE of the camshaft retainers, just to see if that helps reduce chain noise. Apparently most of the noise comes from the chain hitting the GREY metal piece, i think it’s called a cam chain GUIDE. Check that that baby is not too tight or too loose also. I get ticking noise a bit, mostly when the bike is cold. Usually the front cylinder. I don’t like the noise but mines not that bad.
If your SHIMS were TOO BIG, the cams could be pushing the valves onto the pistons. That will make some noise. Bad noise. Could be terminal if left unattended. Won’t do much for the compression either. I’d check the shims again before doing the cam chain, unless you are sure the chain is buggered as i don’t have a puller to remove that flywheel & i kind of like it where it is. 🙂
-----LaserBeam---->