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blazen582
10-16-2007, 02:37 PM
I need a rear sproket that fits a 400ex that is for a 420 chain. Or I need a front sproket for a Cr 85 motor that fits a stock 400ex chain which I think is a 428 or a 520?

Ant one help?

To make a long story short I have a TRX 90 with a Cr 85 engine. TRX 90 and 400 ex are the same rear sproket.. Hopefully I did not confuse!!...

Big - D Racing
10-16-2007, 05:49 PM
400ex chain is a 520, I thought so was a cr85