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Message: [QUOTE="salgeek, post: 1046608, member: 47047"] '04 250 Exc. 100+ hours on it. Time for a top end - no doubt. How much time will it take? Is it best to pull the motor from the frame? Teardown + inspection time est.? Cleaning + reassembly time est.? Parts needed? Tough to say without looking at the piston? Powervalve cleaning - How? Is it really that complex to put back together? How do I torque the 4 collar nuts on the cylinder base/jug? Will a 1/4 torque wrench with standard socket work? Looks like a tight fit. Do I need a crows foot? Anyone know of a step by step guide beyond the manual? thanks - Scott [/QUOTE]