I had a 140cc Lifan, which locked up, destroyed the crankshaft, cylinder and piston. I bought a used 150cc lifan, which didnt have a stator plate, magneto and carb. I used my 140cc carb, stator plate, magneto and whole wiring with CDI. Now the problem is as follows. When I try to start the pitbike, it only starts with choke on, no matter if its warm or not. Some fuel leaking from the bottom of the carburetor. When I start it with choke, and turn it on normal, I have to play with gas all the time or it will die, also when I try to drive, I put it in gear and it acts like it doesent get enough fuel, like boggs down and stuff. Also the throttle is on like really high, I started in 2nd gear as it is snowing outside and I still have regular tires which are completely bald and it started speeding like crazy, barely got to a stop without crashing. What should I look out for? Maybe the injectors in carb are wrong size? CDI not compatible? I will take both carbs apart later and try to see if theres any major differences, and update the topic.