Today I was on youtube and came across a few videos of some Grubee motorized bike frames with shift kits on them and after watching a few of them I got hooked on them. Thing is I am doing reading right now but just trying to figure out how I could do this without having a bicycle style derailleur. I probably don't need a shift kit but I really like the freedom it gives you to have a few different tooth gears to choose from for road conditions. Ive read through the SBP installation instructions a few times now how ever and I am just left with how can I do something like this to make it look quality and not like someone just slapped on a mountain bike derailleur for the rear. I also am now curious about the crank free wheel sprocket, I read on here someone not wanting it cause he doesn't like the thought of a failiure where the freewheeling clutch locks up and breaks a leg. I am looking at the Grubee GT2A frame and will be running a 66cc 2 stroke engine. I will be upgrading eventually to a port and polished cylinder/piston kit as well as the billet diamond high compression cylinder head along with the tuned exhaust.