air

Here's what I got. This thing never ran right from day 1 and I'm tired of it. Do I spend the money on a jet kit or is there a carb I can buy that would be as big as the keihin that will actually work? I finally have my low end rpm smooth and powerful, but when cracking wide open after that...

Hi everyone, I've been having some strange engine issues and would appreciate any insight from some more experienced engine people. For the last 2-3 months, my bike has gradually gotten slower - lost pickup on the low end and lower top speed on the high end. I haven't changed any major...

Hey guys, I have an 80cc motorized bicycle and I can't get it to idle for my own life. Also, it is very difficult to start. I live on top of a mountain and will go down the road with the clutch pulled in, then pop it, and the engine will begin to start, make some noises, I give it some gas, then...

YouTube - ‪motorized bicycle jump‬‏ look at that form lol

Hello again, Second build and twice as many problems as the first.. I bought a used engine from a guy i was buying a bike from. I have no clue what the displacement is. It is a flat head 2-stroke. I will post pics soon. Anyway, I installed it and it kinda started, and I finally messed around...

Ive built 7 bikes never had a problem.......i always ordered from the same people they've always came through. But less than a month ago i was working on number 8 my person bike first the head gasket blows out.... no big deal replaced it done right? wrong! That same week i have an air...