Chain In Engine Rattling-Which One?

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Chain In Engine Rattling-Which One?

The bike in question is a 1992 Honda CB Seven Fifty F2N retro type thingy. Has a chain rattle eminating from the engine somewhere, but it very much doubt it is the camchain (it is not the usual Honda canchain noise). Any idea what else is chain driven in the motor? Any other tensioners that could be shagged?

It's only a 66,000 mile rat bike, so a rattle like this adds to its "charm and character" but I do need to know what it is-and if it is a simple fix, I'll do it. If more complicated, I'll leave it, as it has apparently been doing it for some time.

Cheers

What other chain would it have? loo chain?

Abelrider wrote

What other chain would it have? loo chain?

Primary drive chain, auxiliary shaft chain, balancer shaft chain etc.Don't know if it applies in this case though, chances are it's the camchain. After all it is a Honda

I'd be interested in the answer to this one too.My 91 CBR6 has an odd rattle at the moment, but seems to only be when cold. The cam chain was replaced 2 years ago (mebbe 7,000 miles?) so I'm assuming it isn't this.....

Starter clutch chain?

Whysub wrote

It's only a 66,000 mile rat bike, so a rattle like this adds to its "charm and character" but I do need to know what it is-and if it is a simple fix, I'll do it. If more complicated, I'll leave it, as it has apparently been doing it for some time.Cheers

Try Listening to it using a long screw driver. Handle end on your ear lobe. You should be able to find the location, and then come back to us.

Abelrider wrote

What other chain would it have? loo chain?

You must know the bike-it's the equivilent of an outside crapper.Sound like the noise is coming from the left side, bottom end. Could be the starter, or is this gear driven?

Whysub wrote

You must know the bike-it's the equivilent of an outside crapper.Sound like the noise is coming from the left side, bottom end. Could be the starter, or is this gear driven?

There's a loverly picture above, supplied with thought and effort by Fastfiter.shame you did'nt notice. Take the cover off the left side and have a look...oil will spill out.

Diablo wrote

I'd be interested in the answer to this one too.My 91 CBR6 has an odd rattle at the moment, but seems to only be when cold. The cam chain was replaced 2 years ago (mebbe 7,000 miles?) so I'm assuming it isn't this.....

From what I gather from friends that is the cam chain tensioner causing the rattle when cold. I have the same problem and have been told to change the tensioner for a manual type from debben. The manual one is about 50 quid, same price as a replacement automatic one so thats what I will be doing. I have instruction for how to change the tensioner on a CBR600 if that would be any use to you, just PM me if you want it.

bishbosh wrote

There's a loverly picture above, supplied with thought and effort by Fastfiter.shame you did'nt notice. Take the cover off the left side and have a look...oil will spill out.

Bugger-jumping to the end of a thread before reading the rest of it. Thanks for the tip about the oil too-will save the carpet.I think this will be be the culprit. Hope my spanner work is better than my reading

bishbosh wrote

Take the cover off the left side and have a look...oil will spill out.

Not much of you lay it down on its rhs on something soft.

Abelrider wrote

Not much of you lay it down on its rhs on something soft.

Best to turn it over that way you dont need to crouch down to take a look at whats going on and the bolts are easier to access

did you find the fault? I see the thread is from last year but I can pretty much tell you its the alternator drive chain tensioner theres a self adjusting part to it and the tiny spring can pop out meaning the tensioner doesn't tension but rattles about! its a complete engine strip down just to replace a £54 part you can see from the sump

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