I am having all kinds of problems with my son's Sportsman 90. Mainly though, we can not get it to get enough speed to climb hills and places that we ride. There is no reason why this bike can't haul him up these hills and why it loses power the way it does. Is there any way that I can increase the speed on this bike? My son is only 120 lbs and is not ready for a bigger bike. Is anyone else having problems with the 90, and if so, what are you doing about it? We rebuilt the carborator and that's not the problem.

 

look at this: http://www.hotseatperformance....uct_ID=3798&CATID=248


or if you dont wanna spend that kind of money just look into a clutch kit: only 38$

or a high flow intake 126$

or just the exhaust is 180$.

 

do you have the speed limiting screw backed off at the throttle on the handlebars?