i have an 02 prairie 650 and was curious if there any ways to get some free hp? mine is all stock and im getting ready to do some upgrades and need help on what to look for!

 

I am not trying to put you down or anthing but there is no such thing is free HP. You have to burn more fuel (with air) to make more HP. Adding an open type air filter and/or loud exhaust pipe is commonly done by rookies, only to create more problems and worries but not the power. Don't mess with your stock quad unless you can out-smart the guys with PhD in engineering. If you are just a trail rider and don't plan to race your quad in the track, let your quad stay virgin and just do all the maintenance works and keep it at top running condition. Then, you will have many years of fun riding.