Hey i am still new to the whole bike engine world.... but i have done alot of research and now i need some suggestions. I need an engine on my bike for when i go back to school next semester to scoot around on. There is one problem i cant have some thing to messy because i am keeping it in the dorms.... electric is to expensive and i love how 2 strokes look but i dont want to mess with them... so i think i am sold on a 4 stroke frame mounted engine... What is the best kit and who is a good retailer...