Valve/cam noise pretty intense even after....

[tc80211]

Hey guys,

I have had my '81 GS750E for a while now and have done all the needed things as it is needed. A friend of mine also just snagged a gs750, '82. Same exhaust and I notice with his, you dont have hardly any noise coming from cam/valves... I adjust my valves at regular intervals and everything appears to be operating as it should...

Should I be concerned about the noise? It overpowers the sound of the exhaust when its driving down the road.

[mrbill5491]

Hey guys,

I have had my '81 GS750E for a while now and have done all the needed things as it is needed. A friend of mine also just snagged a gs750, '82. Same exhaust and I notice with his, you dont have hardly any noise coming from cam/valves... I adjust my valves at regular intervals and everything appears to be operating as it should...

Should I be concerned about the noise? It overpowers the sound of the exhaust when its driving down the road.

Noisey in what way? Lots of clicking? If that is the case valves are bit too loose.

[tc80211]

lemme see if i can get a sound clip at lunch... It's not loose valves, just clearanced them... and this sound isnt new, has always been... it just wasnt until hearing a freinds GS that I realized, wow, mine sounds different...

[chuck hahn]

Cam slap..they are moving sideways a bit and the stops are hitting the cam blocks, loose clutch basket nut, looses starter clutch bolt...all are the usual suspects to recheck.

If the cams are ticking against the blocks, well not much to really woprry about if you can live with the ticking. There are several threads on how to mod the blocks and / or the caps to stop the slapping..

http://members.dslextreme.com/users/storagecliff/images/cam_end_float_mod.pdf

[Nessism]

2nd generation 750's are known to have oiling system issues, which can wipe out cams/rockers, and crank/rod bearings. Not sure if this is the case with your engine though. Regardless, I'd shim the oil pressure relief spring to boost the pressure some. This is reputed to be a fix promoted by Suzuki back in the day.

[Steve]

"Cam slap" is not usually noticed while riding, only at idle. In fact, when you slowly rev the engine past about 1500 RPM, it usually goes away.

I would put my money on a cam chain tensioner that has been locked into place, not allowing it to do its job.

Either that, or something has happened to the end of the plunger. It is possible for the ramp on the plunger to get a dimple in it, which prevents proper movement to take up slack in the chain. That dimple needs to be removed.

Before:


After:


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