2000 Polaris sportsman 500, top speed 35 mph

[jhenney]

Hello all, I seem to have lost some power on my ATV, ( 2000 Polaris sportsman 500 ) I am only getting 35 mph out of it at full throttle. From reading several postings on this site it appears that my drive belt could be slipping. I plan on changing to a new clutch kit and my question is this: I currently have stock tires and stock exhaust but I plan on changing the exhaust after the clutch kit and I have no desire to change to larger tires so is it ok to buy a clutch kit for larger tires even though I have stock tires? Would that just give me more power to move the current set up or will it create problems having stock tires on it when I bought a clutch kit for larger tires?

Sorry for the stupid questions but I do not want to cause any future headaches but would like to get more power to the wheels. What kind of mods are done to the air box on these units to increase air flow to the engine? I am a total newbie when it comes to modifying stuff and there are so many different ways to do it from all the reading I have been doing. I would like to get way more speed and power throughout the throttle range, looking at a Supertrapp IDS2 Tunable Silencer/Spark Arrestor - Racing Series exhaust and possibly a EPI clutch kit, does this sound like a good combo to give me what I am looking for? Any chance of getting wheelies out of this unit when I am finished? Wow....that is a lot of questions. :-) Thank you in advance for all your input.

Jeff

[tt425]

Take a look at the camshaft and make sure the exhaust lobe is not worn off.

[kcaves]

also check the clutch buttons in the secondary, they wear out and it makes it feel like the clutch is slipping