2007 Yamaha Motorsports Big Bear 250 Owners Manual - Page 49

2007 Yamaha Motorsports Big Bear 250 Manual

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EBU20670 ECB00220 Engine break-in There is never a more important period in the life of your engine than the first 20 hours of riding. For this reason, you should read the following material carefully. Since the engine is brand new, do not put an excessive load on it for the first 20 hours. The various parts in the engine wear and polish themselves to the correct operating clearances. During this period, prolonged full-throttle operation or any condition that might result in engine overheating must be avoided. 0-10 hours Avoid prolonged operation above 1/2 throttle. Vary the speed of the ATV regularly. Do not operate it at one set throttle position. 10-20 hours Avoid prolonged operation above 3/4 throttle. Rev the engine through the gears freely, but do not use full throttle at any time. 20 hours and beyond The ATV can now be operated normally. 6-7 CAUTION: If any engine trouble should occur during the engine break-in period, immediately have a Yamaha dealer check the ATV. EBU20721 Parking When parking the ATV, stop the engine, shift into first gear, apply the parking brake, and then turn the fuel cock to "OFF". 6 1. Locked position

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6-7
6
EBU20670
Engine break-in
There is never a more important period in the life of
your engine than the first 20 hours of riding. For
this reason, you should read the following material
carefully.
Since the engine is brand new, do not put an ex-
cessive load on it for the first 20 hours. The various
parts in the engine wear and polish themselves to
the correct operating clearances. During this peri-
od, prolonged full-throttle operation or any condi-
tion that might result in engine overheating must be
avoided.
0–10 hours
Avoid prolonged operation above 1/2 throttle. Vary
the speed of the ATV regularly. Do not operate it at
one set throttle position.
10–20 hours
Avoid prolonged operation above 3/4 throttle. Rev
the engine through the gears freely, but do not use
full throttle at any time.
20 hours and beyond
The ATV can now be operated normally.
CAUTION:
ECB00220
If any engine trouble should occur during the
engine break-in period, immediately have a
Yamaha dealer check the ATV.
EBU20721
Parking
When parking the ATV, stop the engine, shift into
first gear, apply the parking brake, and then turn
the fuel cock to “OFF”.
1.
Locked position