[RedBarron989]

I have a 150cc Baja reaction that will not start. I had just replaced the top end with a 155cc bore kit and at first it was just cranking and blowing air out of the Carb and sucking air in the exhaust, i took the carb off and tried starting it and it acted like it wanted to. Well I figured I put the piston in backwards, so I turned the piston around so the arrow is facing the exhaust. It still just cranks over, it is getting fuel and air and has compression. But after I turned the piston around I took the Carb off and tried it and it backfired and caught the gas on fire that was on the engine. My timing is tdc I double checked it to make sure. All my electrical is connected correctly. I am puzzled on this one.