Yamaha BLASTER YFS200S Owner's Manual - page 56

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EBU02091

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 oper-

ating clearances.

During this period, prolonged full throttle opera-

tion or any condition which might result in exces-

sive engine heating must be avoided. However,

momentary (2–3 seconds 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.

0–10 hours:

8 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 throt-

tle position.

10–20 hours:

8 Avoid prolonged operation above 3/4

throttle. Rev the machine freely through

the gears but do not use full throttle at any

time.

After break-in:

8 Avoid prolonged full throttle operation.

Vary speeds occasionally.

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