I don't know if a same thread has been posted. Anyway how do I break-in a new set of top-ends?


What we do with the inline fours is first we warm the engine for several minutes and gradually rev it to 6,000rpm then up again then 7000rpm then up again the 8,000rpm for several minutes.


Afterwards, we ride it like hell. The purpose is to make the piston rings seat with the cylinder wall by using the back pressure the engine has created. 1st gear, 2nd gear, 3rd gear then down shift to 2nd then pop it a gear higher then another then another then going down again to the lowest we can apply. We don't rev the engine to much when at nuetral as it does not give the desired effect we are looking for.


Now the question is, will this technique apply with the 2 strokers? If not, what will be the best thing to do? How much ratio of 2T oil should be mixed in connection with the fuel?
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Team Roadmasters

On the NSR I normally do two or three heat cycles. This is basically starting the engine up, and letting it come up to temp as you would anytime you start up the bike. Let the bike cool down completely between cycles.

After that, do about 10-12 miles below 9500 RPM, another 10-12 miles below 10500 RPM, and then another 10-12 miles below 11500 RPM. After that it should be ready to go. I would check the pistons/rings between heat cycles, and after the riding to make sure the rings are seating properly.

I do that by pulling the pipes, and look up the exhaust ports, running the pistons through a cycle with the bike in gear, and spin the rear tire by hand.

thanks,
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Charles Gallant

Cool, Thanks cgallant for the tip.
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Team Roadmasters

http://www.nsr-world.com/workshop/
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