Hey guys! I just got a 89' yamaha jog(minarelli 2 stroke) and was looking to do some simple, affordable speed upgrades/derestrictions. I plan on cutting off the dummy pipe on my exhaust and removing the variator ring. Will cutting the dummy pipe require upjetting? Also, I live at 7000ft. I then am planning on replacing air filter and spark plug, which I know will require upjetting. Do you have any other recommendations? The scooter tops out at 38 and has 1600 miles. I would prefer to stay inside a $100 budget. (I live in Colorado, USA) thanks for any advice you can give me!