Qt50s have not a lot of cheap or free performance modding,
Www.peeweecycle.com has all the parts you need to buy.
Boysen power reeds, unipod air filter, holeshot clutch springs kit, ect.
However you picked a good bike to beat, I've taken my qt of jumps, through all kinds of trails, and its withstood so much.
I've fallen off and gotten up and started it back up and rode off going just as fast.