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MCE recommends the following conservative approach to engine break-in.
Following these steps will help extend the longevity of your crankshaft and
will eliminate the risks of premature failure.
- Start the engine with the choke ON
- Turn the choke OFF once the engine is running
- Keep the RPMs steady at 4000 until the temperature is at 50C
- Vary RPMs between 6000 and 8000 until the temperature is at 70C
- Shut off the engine
- Let the engine cool to at least 25C
- Repeat the above steps two more times
- Complete 25 miles of easy, 10,000 RPM limited laps while maintaining an engine temperature between 55C and 65C.
The initial steps are referred to as "heat cycling". This is a very
important procedure that allows all the new components to stabilize under
the thermal conditions of operation. Failure to follow these instructions
may have expensive consequences.
Alternative to this break-in routine, contact MCE about breaking in your
engine on MCE's dynomometer. Your engine will be delivered heat cycled,
broken in, and ready to race. Additional cost is involved.
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