here is a link 2 the trans on rivayamaha.com .... http://216.37.204.203/Yamaha_OEM/YamahaATV...9&B=15&Action=O ... on there it shows two number 25's, move them to the opposite sides of the gears, number 21 and 22... that info came from 100hp shooter... on my next trans im also gonna move number 29, 8, and 10... hope this helps u out... L8r d34