hi there, i just bought a 110cc pit bike 4 speed manual. it worked alright untill i was driving it in 4th down a tarmac road. It just lost power and you could distinctly hear it die down. THe engine has lost a lot of compression. when i tried starting it it backfired/made a loud bang and a like sort of a flame/sparke flew a long distance from the exhaust. can anyone tell me what they think has happened? Thanks v much Rupe
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