chain touching casing


new chain is slightly touching the engine casing do i need to shim my sprockets or just let it wear off the knob on the casing, if i need to shim do i do both sprockets or just one:confused:please help

I've never had that problem, even using a "X" ring chain. If it's just the little casting knob, just file it down. If it's actually getting into the case, get a chain that isn't so wide. That's what I'd suggest.

what year bike

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