Yamaha G3 Squeal no netural

[tfbutler]

I acquired a G3 cart, and decided to install a plastic work bed on rear. The cart seemed to jump a little under a load so why not change out the primary clutch with the newer style and upgrade the spring in the secondary with a jake spring ,slapped a new belt on it and now it squeals loud adjusted the belt its tight. The cart can not be pushed in neutral like it did before. Any suggestions or ideas? Seems like if i get it past the loud screams and squeaks it will run just not at low start up RPM. Tired of waking up the neighbors!