I have a 03 zr 900 sno pro, which the drive clutch is not too healthy on. I am not sure for this year what size of clutch it should have, either a 8" or 8 1/2" and 6 bolt or 9 bolt cover. It now has a 8" 6 bolt cover one but it doesnt seem too get the top end out of it that it should. It tops out at barely 100mph. Anyone with any info would be appreiciated Thanks.