ok i been thinking about trying a different carb. i looked at the NT that spookytooth has. $25. then i was on ebay at the boygofast store and saw 1 that had the fuel shut off on it like the NT. sumthing like $12 or so for it. heard alot of good about the NT. wut bout the 1 from boygofast??? wut y'all think?? link for the boygofast 1: gas bicycle Motorized BIKE ENGINE Carburetor w on/off R - eBay (item 170524267908 end time Dec-05-10 09:00:13 PST)