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20-12-07, 04:12 PM

It is possible for a very, very shagged chain to ride up the teeth on a sprocket and jump off the top. I've (thankfully) never experienced on a motorcycle, but I have on my very muddy off-road pushbike. The wear between the plates and the pins means that the chain can expand a lot when put under load. When it does this, the distance between the rollers gets greater and can creep up the sprocket teeth, outwards. Grab the chain at 3 o'clock on the rear sprocket and see how far you can pull it away. Even at 3-4mm at most, it's past its best- before date.

20-12-07, 04:12 PM	#8
chazzyb Guest Posts: n/a	Re: Help with horrible noise............ It is possible for a very, very shagged chain to ride up the teeth on a sprocket and jump off the top. I've (thankfully) never experienced on a motorcycle, but I have on my very muddy off-road pushbike. The wear between the plates and the pins means that the chain can expand a lot when put under load. When it does this, the distance between the rollers gets greater and can creep up the sprocket teeth, outwards. Grab the chain at 3 o'clock on the rear sprocket and see how far you can pull it away. Even at 3-4mm at most, it's past its best- before date.