Re: Chain and master link questions
Typically you'll find the industrial #41 chain better quality so therefore a smoother runnig chain. I've often seen the kit supplied #415 chain that had stiff places, kinks and twists all of which can make for a noisier and rough running chain drive. If you run the 415 check it for tight rollers and for straitness by laying it out on a flat surface and looking for uniformity in the way it lays. Expect it to show premature wear as compared with the #41.
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