I have a 96 tigershark montego that seems to work pretty well if riding solo. Im roughly 200lbs and It can climb up to aprox 45. Throw my kid 100lbs on the back and it wont accelerate over 15 mph. The engine revs but it just doesnt want to plane and move. After a couple minutes it seems to go into limp mode. I have to let off the gas and let it idle for 30 sec or so and then it will rev up again under WOT but barely moves. Wearing? Impeller? Carb? Any ideas greatly appreciated. Thanks