SG250 Owner’s and Service Manual
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Engine
The SG250 engine is an air-cooled, overhead valve, counterbalanced engine.
Oil Change
The following information applies to SG250 oil changes. Note that the photos in this section of the
Service Manual show the TT250 motorcycle. The SG250 and the TT250 use the same engine.
The SG250 takes 1.3 quarts of 10W-40 motorcycle oil.
The SG250 has two oil cleaning devices. One is the strainer (it is addressed in this section of the
Owner’s and Service Manual), and it should be removed and cleaned with each oil change. The
other cleaning device is the centrifugal oil cleaner, which is located inside the right engine
crankcase cover. The centrifugal cleaner does not require regular cleaning; it should only be
cleaned when the right engine crankcase cover is removed for other reasons. Gaining access to
the centrifugal oil cleaner is explained in the clutch replacement section of the SG250 Owner’s
and Service Manual.
The SG250 engine has one oil fill port on the right side of the engine.
The SG250 engine has an oil viewport on the right side of the engine for assessing engine oil
level, and the bike needs to be vertical to use it.
The SG250 engine has an oil dipstick, which is attached to the oil fill port cap.
You’ll need a 17mm socket to remove the oil drain plug.
You’ll need a 24mm wrench to remove the oil strainer cap.
You’ll need an oil drain pan to put beneath the engine when you drain the oil.
Use only non-synthetic oil for the first 1000 miles. If you wish to use synthetic motorcycle oil,
you may do so after a 1000-mile break-in period.
You should do the first oil change after 200 miles, and then change the oil every 2500 miles.
You should change the oil more frequently if the motorcycle is subjected to sustained high
speed use or if the motorcycle is operated in dusty environments.
With the above in mind, the procedure for changing the oil follows.
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