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Cam chain noise AGAIN

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fighterDaz

Cam chain noise AGAIN

Hi, my 82 cb750K is very noisy at tick over, Im sure its the cam chain. I have a gs450 with chain noise that I consider normal. I know its been asked before and will be again, but I tried to loosen the front and rear bolts to adjust the chain and nothing changed. Do they have to be loosened at the same time whilst bike is ticking over, can someone give it to me in very easy steps..I am not stupid, but sometimes the obvious can be overlooked. Thanks guys n girls. fD

Youth is wasted on the young.

TOOLS1

Re: Cam chain noise AGAIN

Administrator

I adjust the cam chain by loosening the bolt. Then I turn the engine over a 1/4 turn using a wrench on the nut at the end of the crankshaft. Then tighten the bolt. However I doubt the noise is because the cam chain is loose. It is more then likely your carbs are out of sync. When the carbs are out of sync it will sound like the cam chain is about to fly out of the engine. One good way to tell is if it quiets down with a little throttle. Then it is the carbs, for sure.
TOOLS

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1976 CB 750-A X 2
1977 CB 750-A X 4
1977 CB 750-K
1976 CB 750 F
1981 CB 750
1966 Kawasaki SG 250
1981 KZ 750 LTD
1973 CB 350
1979 CM 185 Twinstar
1982 Honda XL 80
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fighterDaz

Re: Cam chain noise AGAIN

Tools, are we talking 2500 revs or less, it certainly sounds sweet when revved normaly, its amazing that carbs could make that sound, how??

Youth is wasted on the young.

Re-run

Re: Cam chain noise AGAIN

Administrator

When the carbs are not synced, the load placed on the engine is not balance as the cylinders are not equalized in power. If you pull in the clutch, it should diminish the sound as well. If so, definitely carb sync related.

The ride IS the adventure. The destination is just to get gas!

TOOLS1

Re: Cam chain noise AGAIN

Administrator

In reply to this post by fighterDaz

I do not know all the theory behind how the carbs would cause this, but it sure does. And from what, you just said, that is your problem. I sync my carbs every season, or when I tune it up. It is surprising, you think it is running good, and when, you start syncing them the engine will just smooth out, like a sewing machine.
TOOLS

Piute

Re: Cam chain noise AGAIN

In reply to this post by Re-run

RERUN :When the carbs are not synced, the load placed on the engine is not balance as the cylinders are not equalized in power. If you pull in the clutch, it should diminish the sound as well. If so, definitely carb sync related.
TANKS...Piute...
Never thought of that ,

1977 CB750 F2 Super Sport
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