Looks like that thing has parts on it from all different years. I can see the front plastics are from a 2001, i'm pretty sure those rear plastics are maiers because of the way they're all droopy, who knows what else might have been changed. Kinda hard to tell through the mud, but is the cylinder head a different color from the rest of the motor? That year should be all black if it's the original motor.
Never heard of those shocks, but if they're adjustable then they are definitely aftermarket. Either something really old, or maybe it's a canada-only thing. How do they seem to work?
If you want to know for sure what year it is, find the vin number on the frame (bottom frame tube near the shifter). I lost the link I had to it, but if you search the web you can find information that deciphers the vin numbers. Even if you just find one for cars, it'll still be accurate for finding out what year it is.