Reply To: Valve clearance, camshaft, camshaft tensioner – a problem or a serious fault?

[Maciek]

Thanks Marcel for your reply.

I will reply to you under yours questions.

This may sound stupid, but i trust you already did that but can you tell us what compression is on each cylinder?

To be honest I did not do that, is’t not so easy to borrow such an equipment. I will oreder it and I will check it. But form the other hand, there is a relation with low compression on pistons after valve clearance? Forgive me for asking, but I’m a total greenhorn on the subject….

As you follow the service manual , i won’t need to explain how to do it but if you get stuck , just reply here again.

Thanks mate!

Also, when the noise comes from engine –> Get a screw driver and poke the tensioner –> put your ear on the other end of the screwdriver — > ask someone to rev the bike a little bit, so see if you hear any abnormal/weird tensioner noises and cam chain slapping hard ?

Noise comes from rear cylinder (that’s what I’m hearing). I poke the tensioner few times on neutral RPMs, also I puted my ear on a screwdriver and didn’t hear any different noises. Also I was setting tensioners in the same place as they were. Maybe I’m stupid, but I’ve got and idea with yours proposal and I take a small screwdriver and inserted ito the tensioner hole and a little bit released the tension of it, and I’ve heard the camshaft chain clearly, but when I realesed it back I didn’t hear the chain, but it’s still metal knocking.

Did also check each camshaft is correct ? and checked cam-shaft bearings are OK? – Sometimes previous owner puts a “Rear EX” camshaft in to Front Cylinder and problems start

I inserted the camshafts according to the markings and pins in them. The bearings have been checked and are fine, the bridges are not slipped, the camshafts are in very good condition with no pitting or scratches.
For me, currently if I have put it together correctly then it should be all right or, if there were shafts swapped by the previous owner, would there be a problem?

 

Don’t get me wrong, but before the valve clearance, riding was smooth and without any issues, only this metal knocking appears, but it was not so loud. After valve clearance it’s worse. I’m guessing, that something was not properly setted back as it was…

Does the screw force have a big impact on that?

Will the strength, order of tightening of the timing bridge bolts affect camshaft deflection/flexion? Or that it will not tighten the camshaft bearings correctly?