Hey I've recently installed a 140cc 2v engine in my pitbike as it had a 110cc jialing 3 valve engine that lost 3rd and was gutless in the end. So when I kick it over it does nothing with the choke on or off when I have the choke off and mess with the accelerator and kick it over it sometimes fires and when it does it back fires a little bit through the carb and back fires out the exhaust and pushes the kick start lever up with ya leg :/ and it has the 22-24mm carby off the 110 on it
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