Hello- i just finished a complete re-build, top and bottom end..as well as a new clutch and replaced everything in the clutch basket, pressure plate and clutch boss. also, replaced all seals and gaskets while cases were split. the entire process took roughly 75 hours for myself, and my buddy worked alongside me for roughly 30 hours. the bottom end took 4 nights in a row, from 7 - 2am. the rest was here and there. the motor runs beautifully now, bike woiuldn't idle before, now i can leave it running for 30 min, come back outside and its still purrin. this was my first complete re-build, but i have done a few scags (commercial mowers) so i have experience with working off of blown up diagrams. Anyways, give it a shot, i really enjoyed myself, just take the time to clean everything, and go the extra step and replace EVERYTHING while the cases are apart, you don't wanna do it again. in the end you"ll be happy u did, you will have a brand new bike for about 600 bucks!!