1. you should be able to do a ton easily, if not, remove the windshield and bags if you have them, or change your sprockets, or go on a diet
2. I doubt you have the skill level to outride the motor/chassis combo (not trying to offend)
3. you should be able to get mid 50's on hp and torque without modifying motor internals
4. anywhere from 40-50 mpg, and there are guys on this forum with 6 figure odometers without a rebuild
