you can do plenty to it... power--- it doesnt need more hten the 50 it has... one word to stunt it... GEARING. Go down one tooth up front and all the way up to about a 62 tooth rear... but just advise... u cant do that if u intend to ride at freeway speeds... it will tach out at around 70. But my old EX500 has lots done. 2:1 Jardine race exhaust, all smog and airbox equip. removed, rejetted. I was gonna use to to stunt since its a 91 with over 25,000 miles. But the brakes up front dont thrill me, still i wanna use it for slow wheelies. Also...put the softest tires u can find to fit the rim....youll need em. And yeah good sliders will do a ton or a shop can bend and weld steel tubing for ya for a fair cost. If you stunt it out, plan on spending close to 1000$ to get it ready and protected... need a bigger(longer) stronger chain too. If you do all that to it, keep it cuz resale isnt gonna be good when it gets all F'd up... hence why i still have mine to teach new riders on.