Yamaha RAPTOR YFM660R Owner's Manual page 162

1. 0 ~ 10 hours:
Avoid continuous operation above half
throttle. Allow a cooling off period of five
to ten minutes after every hour of opera-
tion. Vary the speed of the machine from
time to time. Do not operate it at one set
throttle position.
2. 10 ~ 20 hours:
Avoid prolonged operation above 3/4
throttle. Rev the machine freely through
the gears but do not use full throttle at any
time.
3. After break-in:
Avoid prolonged full throttle operation.
Vary speeds occasionally.
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