bit about me- ride 08 550fe .Had since new, finally last week gave it a top end rebuid even though it still ran well,started well and did not use oil or blow smoke. This berg had done 17,640 ks(no bs).All i have replaced bar consumables are cam chain,starter clutch,clutch plate and head stem bearing (all once only). Its been an awesome machine. Live about 7 ks from border ranges nsw/qld border. When we pulled motor down it was still in quite good condition.Valves were starting to wear but not badly. cheers steve.