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• Remove the exhaust valve and spring retainer by removing
the mounting screws.
• Inspect the exhaust valve and cylinder sliding surface for
nicks, scratches, wear or other damage.
• Remove the oil seal with the special tools.
09921-20200 : Bearing remover
09930-30102 : Sliding shaft
CAUTION:
The removed oil seal should be replaced with a new one.
CYLINDER DECARBON
Decarbon the exhaust port and the upper part of the cylinder,
taking care notto damage the cylinder wall surface.
ENGINE 3-16
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