chain falling off
ok so I got everything done but now I cant find any reason my chain is falling off. I have it as tight as it possibly can go. then I use the stock tensioner and the bike pedals fine then I can start the engine and ride around the block but it seems if I change speeds to much or go too slow then the chain falls off the rear sprocket usually inward but once outward!! what can I do? has anyone ever tried a rear derailleur on the engine drive side?? please I need help on this one!!