I got a 2002 Trail Boss 330 and took carb off and cleaned it and got it running.

When you place it in reverse it works great and the rev limiter makes it run fast.

Belt is good and has plenty of teeth.

Chain is brand new and looks good.

When you place it in H high, it grinds bad after 6" of travel.

Any idea what this might be since reverse works flawlessly ?

Thanks for the help I appreciate it.