Yamaha XZ550RJ 1982 Owner's Manual page 95

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Inadequate lubrication may damage the
transmission.
Engine break-in
There is never a more important period, in the
life of your motorcycle, than the period
between zero and 1,000 km (600 mi). 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 1,000 km (600 mi). The
various parts in the engine wear and polish
themselves to the correct operating clearan-
ces. During this period prolonged, full throttle
operation, or any condition which might
result in excessive heating of the engine,
must be avoided.