I took all the parts I wanted for a few diffenent kits I have not just done a top end and think im a pro rider lol. I took the advise of some great motor builders and took the advise of a suzuki employee and I have a great motor. I agree the yoshi kit is great the only thing I said is its not the exact replica of dougs motor and its not. It is close but there is more fine tuning with his. yoshi makes a very relialible kit and that is the biggest thing the pro bikes get torn down more and need more attetion then something off the shelf. Geeeezz guys im a z400 rider too.