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Remove the spark plug.
Install the cylinder pressure gauge.
At full throttle, measure the cylinder pressure by starting the
engine.
Following items shall be checked in case of extra-low
pressure:
—whether the spacer of cylinder cover is damaged;
—whether piston ring is damaged;
—whether piston ring is worn;
—whether the piston or the cylinder is worn. （测气缸压力：measure the cylinder pressure）
When compression pressure is too high, please check whether there is too much carbon fouling inside the
combustion chamber and at piston head.
Gear oil
Inspection
* Note
Set the middle kickstand on the flat ground and keep the
motorcycle upright for checking the oil level.
Disassemble the dipstick after the engine stops.
It is good if the oil level at the lower limit of the dipstick.
（放油螺栓：drain bolt）
Add gear oil when the oil level is too low.
Install the dipstick.
* Note
Make sure whether the bolt is well sealed, slippery or damaged.
Gear oil replacement
Remove the dipstick.
Remove the drain bolt and gear oil is drained.
Install the drain bolt.
* Note
Make sure whether the bolt is well sealed, slippery or
damaged.
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