Drive Chain Width

I just installed a Regina standard width O ring chain on my yz426 and it runs pretty darn close to the engine case and the master link has a noticeable rub on the sides of my half worn out chain guide. Are these bikes supposed to run a narrow chain? :naughty:

i think as the guide wears the chain drops into the plastic and it does that. i about wore the clip off mine and called t.m.designworks to see if it was wore out enough for the replacement warranty,they told me no just trim the sides down with a razor knife. kinda a pita but it worked. i guess they don't honor the warranty t'ill it wears into your swingarm!! :naughty:

If it's the 520 chain, it's the right width. I run a Regina ORN on the 450, no problems at all.

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