So my puch had a crack in the stock 12carb so i upgraded it with a new 15mm bing but once i got it on it wont run right. It starts and when i start to move it takes a long time to get going over 15. It seems like i cant go full throttle until i hit 20ish and it then picks up to 27 or so. I have to keep the throttle half way until the engine revs up to how it should sound then it runs fine... or until i get to a hill or or have to stop. I had it going just fine before the carb broke. I cant figure out what wis wrong. The low end should not be this bad. Any ideas?
Puch Newport stock E50 with a Boss pipe and a 15mm Bing Carb clone with a 72jet in it, and a lightened clutch and a 12mm intake.