Yamaha BIGBEAR 250 Owner's Manual - Engine Break-In

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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

U1P012E0.book  Page 7  Thursday, April 20, 2006  2:31 PM