SOHC.co.uk Forums > CB750

Intermittent noise when riding, could it be my chain?

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McCabe-Thiele (Ted):
Not sure if this helps - I had an issue on my Suzuki 750 that was quite odd to me - there was a medium speed thrumming sensation that came and went. It turned out to be the chain had stretched in places. I replaced the chain & spockets it rode perfectly after that.

Craizeehair:
Thanks, pretty sure it’s a chain and sprockets change for me and see from there. Appreciate all the replies.

flatfour:
I had something similar on my CB750 K6 a few years ago.

It turned out to be the final drive chain, where the original had been replaced with an "O" ring type and, being wider it was touching the engine case at times, presumably depending upon its exact position on the front sprocket as it rotated.

A replacement standard chain sorted things out.

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