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Going threw the process of buying a CRF150/expert. Is there any special way to break these bikes in from new?

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You have to allow the engine to run at different rpms and not just stay at one constant rpm. No more than 80% of max power for the first half hour. Drain oil at 1 hour. Switch to synthetic on the 3rd oil change.

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Going threw the process of buying a CRF150/expert. Is there any special way to break these bikes in from new?

The owner's manual is pretty simple on the break in procedures.

"For the first day or 15 miles, avoid full throttle starts and rapid acceleration."

Most modern 4-stroke race engines require only a little break-in time to seat the rings and be at full compression, but lugging a zero-time engine is probably the worst possible thing to do. Lugging can put too much stress on friction components like the crank bearings and the piston wrist pin that haven't had the time to seat in properly.

With that said, I usually ride any zero-time bike, or a bike with a fresh top end job, very easily in 2nd or 3rd gear and concentrate on being smooth and keeping the engine from lugging or over-revving.

Just take it easy expecially for the first 10-15 minutes, then gradually work your way up to full speed. By the time the engine has 30-45 minutes of time, it should be ready to handle a few serious starts and pulls through the gears up to the rev limiter.

After an hour or a bit more on the engine, it should be ready to race.

Enjoy!

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