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•
Clean and examine the piston ring groove. It must
not be more than 1.6 mm.
•
Examine the piston ring play. It must not be more
than 0.15 mm.
7.12.5 To examine the cylinder
•
Make sure that the surface layer of the cylinder is
not worn, especially in the top end of the cylinder.
•
Make sure that the cylinder does not have score
marks.
911 - 001 - 15.02.2019
7.12.6 To assemble the cylinder and piston
1. Lubricate the needle bearing with two-stroke oil and
put it into the connecting rod. Make sure the bearing
moves freely in the connecting rod.
B
A
2. Install the piston. The arrow at the piston top must
be in the direction of the exhaust port. Push in the
piston pin and attach the snap ring.
Note: Always use a new snap ring.
3. Lubricate the piston and piston ring with two-stroke
oil.
4. Carefully attach the piston ring on the piston. Make
sure that you do not cause damage to the piston ring
or the piston.
A
Repair instructions - 39
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