Sweet bike! If you give us a close-up shot of the engine, we can tell you which type you have.
Remove the rear wheel, remove the sprocket and measure it. You'll need to know the number of bolts holding the sprocket, the bolt circle and the hole size. From there, we can hopefully guide you. Measure the distance between the pins of the chain.
Tires, chains, fuel filters, clutch cables, etc are easily found at
www.rockymountainatvmc.com or
www.bikebandit.com