I just got a kawasaki 650sx for 250 dollars it is an 89 model. It runs great and has aftermarket parts like k&n flame arrestor, west coast pipe, west coast waterbox, after market ride plate not sure which one and it will be getting an aftermarket head put on it. I was curious if there was a reason I got it so cheap I mean $250 for all that is cheap so I was curious if their was like a defect on that year or I just got really lucky... What I have read their is really nothing else you can do to the motor and all the aftermarket stuff is at least a grand or a little less alone plus the ski is in great cond and runs great??? Whys that???