Engine Break-In - Yamaha BANSHEE YFZ350R 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 oper-
ation or any condition which might result in
excessive engine heating must be avoided.
However, momentary (2–3 seconds maxi-
mum) full throttle operation under load does
not harm the engine.
Each full throttle acceleration sequence
should be followed with a substantial rest peri-
od 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 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.
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