2009 Yamaha Motorsports Big Bear 250 Owners Manual - Page 49

2009 Yamaha Motorsports Big Bear 250 Manual

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EBU20672 Engine break-in TIP G For ATVs equipped with an odometer or an hour meter, follow the figures given in km (mi) or the figures given in hours. G For ATVs not equipped with an odometer or hour meter, follow the figures given in hours. There is never a more important period in the life of your engine than the first 320 km (200 mi) or 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 320 km (200 mi) or 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. 0-160 km (0-100 mi) or 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. 160-320 km (100-200 mi) or 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. 320 km (200 mi) or 20 hours and beyond The ATV can now be operated normally. ECB00220 NOTICE If any engine trouble should occur during the engine break-in period, immediately have a Yamaha dealer check the ATV. EBU20721 6 Parking When parking the ATV, stop the engine, shift into first gear, apply the parking brake, and then turn the fuel cock to "OFF". 6-7

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6
EBU20672
Engine break-in
TIP
●
For ATVs equipped with an odometer or an hour
meter, follow the figures given in km (mi) or the
figures given in hours.
●
For ATVs not equipped with an odometer or
hour meter, follow the figures given in hours.
There is never a more important period in the life of
your engine than the first 320 km (200 mi) or 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 320 km (200 mi) or 20
hours. The various parts in the engine wear and
polish themselves to the correct operating clear-
ances. During this period, prolonged full-throttle
operation or any condition that might result in en-
gine overheating must be avoided.
0–160 km (0–100 mi) or 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.
160–320 km (100–200 mi) or 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.
320 km (200 mi) or 20 hours and beyond
The ATV can now be operated normally.
NOTICE
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”.