Mash Two Fifty 250 cc, User Manual

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Chapter 5
Running-in of a new motorcycle
The importance of correct new vehicle running-in was mentioned in Foreword.
The correct running-in method is as follows.
Maximum speed
The maximum speed during running-in period is shown in the table.
First 800 kilometers
Maxi 70% of the throttle grip
< 80 Km/h
At 1600 kilometers
Maxi 70% of the throttle grip
< 90 Km/h
After 1600 kilometers End of running-in End of running-in
Changes of engine speed
Do not ride at a constant engine speed for a long time. For a better running-in,
properly increase and reduce the throttle opening. Change engine speed from
time to time to let various engine parts get "bearing" pressure. When the
pressure is "unloaded", the engine parts will cool down, helping the fitting of
different parts. During running-in period, engine load may be properly
increased. Apply some load to engine parts to guarantee good fitting. This is
every important, but do not apply excessive load to the engine.
Avoid riding at a low speed
Running at a certain low engine speed (with light load) can only polish the parts
but cannot get a good running-in. So long as the upper limit of recommended
throttle opening is not exceeded, ride the vehicle in various gears with proper
acceleration. However, never ride at the maximum acceleration during the first
1600 km.
Make oil circulating before riding
After starting of warm or cold engine and before applying load or riding, let the
engine run at idle speed for an adequate time. This allows lubricant to flow to all
import engine parts, so as to reduce wearing and increase the service life. This
also helps the engine to warm-up sufficiently.
First maintenance inspection
The maintenance of the first 1000 km is the most important. During running-in
period, all engine parts have been run-in and other parts engaged. Then, all
parts shall be adjusted, all fasteners be tightened, contaminated engine oil be
replaced and filter element be replaced.