60H5E11
1
Piston and cylinder
Following items have been given to improve the durability for the piston and cylinder.
A hard anodic oxide coating has been given to the piston pin boss and piston ring groove of the #1
and #2 piston.
Multilayer plating has been given to the piston ring.
The cylinder sleeve without the exhaust slit has been adopted not to accumulate some deposits,
which can prevent the piston rings from entwining.
Also, the shape of the exhaust port has been given the gradual curve design to obtain the best engine
performance and avoid scuffing of the piston ring.
60H10040
1-8
Piston
Hard anodic oxide coating
Exhaust slit
Cylinder sleeve
Exhaust port
Scavenging port
Cylinder sleeve
(New models)(Previous models)
Features and benefits
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