Hi I am just looking to buy a Bullit hero 50cc as it what I'm allowed but I need to go on a busy dual carriageway and I think it would be a lot safer if I can go abit faster with the flow of traffic if anyone knows a big bore kit for a Bullit hero or if I can put a 125 cx engine in the 50cc bike frame I would greatly appreciate it thanks
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you could but the fuel system wont supply the correct amount of fuel also the brackets that hold the engine may have to be moved and rewelded