Starting A Warm Engine; Warming Up; Engine Break-In - Yamaha YFM100T 1987 Manuel Du Propriétaire

Starting a warm engine Engine break-in
To start a warm engine, refer to the "Starting There is never a more important period, in
a cold engine" section. The choke lever the life of your machine, than the period
should not be used. The throttle should between zeroand 20hours.
be opened slightly. For this reason we ask that you carefully
read the following material. Because the
engine is brand new, you must not put an
See "Break-in Section" prior to operating excessive load on it for the first several
engine for the first time. hours of running. During the first 20 hours
the various parts in the engine wear and
polish themselves to the correct operating
Warming up clearances.
To get maximum engine life, always "warm- During this period prolonged full throttle
up" the engine before starting off. Never operation, or any condition which might
accelerate hard with a cold erigine! To see result in excessive heating of cylinder, must
whether or not the engine is warm, see if be avoided. However, momentary full throttle
it responds to throttle normally with the operation, under load (2 _ 3 seconds max-
choke turned off. imum), 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.p.m.'s so the engine can rid itself of the
6-3 temporary build up of heat.