Jet kit
#3
K&L,Parts Unlimited,Tucker Rocky all have kits for different machines,BUT just a jet kit isn't going to improve the Sportsman 500 that much(may even make it a little touchy!) Carb mods,exhaust and clutch mods all work hand in hand. This is really a utility quad and best left that way,BUT you can improve clutching etc,BUT if you want to spend $$$, high performance kits are available! Others can chime in on this and an help in what they have done to their atvs! Plus welcome to the forum!! OPT