Found the correct sprockets for the trx/yfr750. The sprocket carrier has 6 holes, 150 mm diameter , the sprocket has to have an inner diameter of 130mm so it can fit on the carrier. I've gone for the 520 pitch conversion race chain and sprockets, most front sprockets fit as they have the same diameter and number of grooves. The only bike that has the same dimensions above are the yzf600 thundercat, not the r6 that I was led to believe which turned out to be dodgy advice. Luckily A and R racing are sorting this out. The earlier r6 was 145mm with 5 holes, the later r6 from 2003 had 6 holes but were 130 diam I think.
Luckily the thundercat is still catered for and renthal do a 520 race kit with a range of rear sprockets.....so use my advice above!...thundercats rule!
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