Engine Break-In - Yamaha BANSHEE YFZ350M 1999 Owner's Manual

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 various parts in the engine wear and
polish themselves to the correct operating
clearances.
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
temporary build up of heat.
If any abnormality is noticed during this
period, 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
operation. 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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