I have an 03.5.
Over 3000 miles and never had the heads off. Been pulled home one time, broken drive chain.
Very solid machine very reliable.
I now have the M1000 and when I jump on the 900 it still feels very good when climbing. Honestly it is much easier to throw it around then the M1000. Doesn't climb as well in a point and shot but in the tight stuff it is easier to ride IMO.
Put a riser on the bars, I like the twin pipes, ride it like you stole it.
5 grand is a bit steep. I would work the price down a bit. IMO
O' one last thing, make sure you change the recoil rope once a year. Easy insurance and will keep you from having to start it off the crank in the back country. They are hard on starter ropes.
Watch the primary clutch, they love to eat the weight bushings every 300-500 miles. Also pull the drive shaft and change the bearings and keep the lubricated. Another insurance thing.
Thunder