Did you check out the rear suspension: condition of bushings, condition of hyfax strips, condition of bogie wheel bearings, check the W arm for cracks, grease all the fittings, check the track alignment and tension. When is the last time you changed the coolant? should be changed every 2 - 3 seasons. How about the front suspension? Not to much free play in the bushings? Greased the front spindles? When is teh last time you changed the gas filter in the tank? How about the C-C and clutch offset alignment? Condition of the bushigs in the primary and secondary clutch? How clean/dirty are the clutches, may be a good time to remove them, clean and inspect them. Did you check the drive axle bearing (right under the speedometer drive) and what about the jackshaft bearing condition? Definitely open the chaincase, clean, inspect, refill with a quality chaincase oil. And the list goes on and on......