Originally Posted by cdelong
Did you notice that type of wear pattern on the piston/sleeve during early break in? Mike told me to hit it for two or three more tanks at 240F on the track then shoot for 280F. Ron C. also told me they start the MSR spring at 9.2mm and toss it out by 10mm because it looses it's "memory" and your clutch setting will not be consistent.
Like mugen drew stated I would go with what Mike Swaugers advice since he has loged a lot of time on these engines and you are getting your info from him first hand. I'm sure other pros have different methods but then you don't have them here to give advice on this particular motor.
The the clutch advice they gave you is pretty good from when I have tried it.