Depends on what type of riding you do and what you plan to do to the motor. If I were you I would get it running first. Pick a pipe that will benefit you the most. Clean and jet the carb, remove tors, upgrade reeds, uni air filter and remove lid, DIY +4 timing advance. That will get it going good. Then you can mod from there. You will want to widen it some. Depending on budget this could mean $60 in spacers or spacers and aftermarket a arms for $400.