I am so frustarted with this 78 pinto. I installed a 60cc euro and biturbo pipe. I left the stock 72 main in and it fired right up and runs great from 20-40 when it gets into the pipe. From down bottom it is a dog and dies out. I tried an 82 main and it was way to fat. I tried a 66 main and it ran like shit. With the 72 it runs the best but when you come down from 40-0 it stalls right out and when you come to stops you have to keep on it with the brake on orelse it will stall. Here is a vid i made of it with the 72 main/ You can see at 1:00 min what i am talking about. Any help is appreciated guys. Thanks alot Moped Jeff