ok this winter i am planning to do a build on my terminator 50cc pocket bike,(same as X7 or any 49cc 2 stroke super pocket bike) i got it for free form the neighbor, right now the list is, needs cab and air filter, footpegs, brake levers, paint plastics, need to put some tire slime in the rear tire, need to scrap the electrical system, and thats it for now. i have run this engine once and it had carb probs so it ran crappy the the carb broke, and i'm wonderin if i should look for a new engine instead. ihave found a few web sites for pocket bikes but i'm still not shure what to do in the engine, i could buy a new 49cc engine for 130 bucks off ebay for it, or should i get the racing carb and air filter for it, also i was thinkin maybe run a bigger engine? like one off a X18 for any of you who have knoledge of pocket bikes, please help me.