Yamaha Badger YFM80M, Owner'S Manual, Page: 47 / 141

6-6
EBU00209
Engine break-in
There is never a more important period in
the life of your machine than the period
between zero and 20 hours.
For this reason, we ask that you carefully
read the following material. Because the
engine is brand new, you must not put an
excessive load on it for the first several hours
of running. During the first 20 hours, the vari-
ous parts in the engine wear and polish
themselves to the correct operating clear-
ances.
During this period, prolonged full throttle
operation or any condition which might
result in excessive engine heating must be
avoided. However, momentary (2 ~ 3 sec-
onds maximum) full throttle operation under
load does not harm the engine.
Each full throttle acceleration sequence
should be followed with a substantial rest
period for the engine by cruising at lower
r/min so the engine can rid itself of the tem-
porary build up of heat.
If any abnormality is noticed during this peri-
od, consult a Yamaha dealer.
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.
4EM91A_a 9/28/99 2:50 PM Page 6-6