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Okay guys. This may sound like a naive question given that I've been riding for several years now and logged 40k+ miles.
I frequently read about people replacing their chains and going to a "520" chain. What does this mean exactly? After a quick google search, my Triumph takes a "525". Why is one better than the other?
I fundamentally get why people change the sprocket sizes.
Once again, sorry if this seems mundane to you.
Rob