Hello all Im Scott Im new to the site and as of yet have never built a motorized bike but that is going to change in about 2 months. I ran my own shop ( working on cars ) for over 10 years so I for see no big problems with installing a 2 stroke on either my huffy cruzer or trek 800 but I still have many questions. 1 I live in Chicago and have been researchering the laws with very little luck the only thing Ive noticed is that everyone that has had trouble with the law around Chicago were all doing 30 mph or more. That said what sprocket would someone want to use to max out between 20 and 25 mph? and if this helps I weigh about 280lbs 2 I plan on putting lights on the bike that I motorize any ideas from the old timers on the best plan of action for that?