16 tooth sprocket too big!

[GG]

Hi everyone,

I wanted to gear down my cb77 since I live in a mountainous area. I had a 16t sprocket on the front, and 32 on the rear. When I took the side case off, I noticed that the chain had been chewing away at the transmission housing! Thankfully there is no hole yet! There was plenty of aluminum filings.

I think part of the reason might be the chain I'm using - an RK x-ring chain. It might be a bit fatter/higher. However, the tolerance with the 16t sprocket is VERY CLOSE. I would recommend NOT using that large a sprocket on the cb77.

GG

[davomoto]

GG,

It's the chain for sure! The o-ring and x-ring cahins are a bit wider than a standard chain. I have a 16 on my street tracker, but am running a 520 chain with no clearance issues.

Davo

[GG]

Hi Davo,

Thanks for the response. It must be my 530 x-ring chain. I now have a lot of grooves on the inside of my housing! But the 15t sprocket took care of that - and also gave me the lower gearing that I need for all the hills around here.

I always appreciate your input on things. Keep up the good work!

GG