45
6
Cylinder and piston
Inlet side.
Particles of dust and dirt from carbon-like
deposits on the top of the piston and in the
piston ring groove. The piston ring sits
firmly in the groove. Piston material has
been worn away.
The lower part of the piston skirt is thinner
on the inlet side than on the exhaust side.
The piston scored and worn from the piston
ring down on the inlet side.
Extensive damage to the lower part of the
piston’s inlet side.
Cause:
•
Faulty air filter. Small dust particles
pass through the filter.
•
The filter is worn out due to too
much cleaning, whereby small holes
have appeared in the material.
•
Unsuitable filter maintenance, such
as wrong method or wrong cleaning
agent. Flock material becomes
loose and holes appear.
•
Air filter incorrectly fitted.
•
Air filter damaged or missing.
Action:
Fit a finer grade filter.
Check the filter carefully for holes and
damage after cleaning. Replace the
filter if necessary.
Clean more carefully and use the right
cleaning agent (such as tepid soapy
water).
Change the filter.
Fit the filter correctly.
Fit a new air filter.
Larger, softer particles that penetrate into the engine cause damage to the piston
skirt under the piston ring as the illustration shows.
Cause:
•
Air filter incorrectly fitted.
•
Air filter damaged or missing.
Action:
Fit the air filter correctly.
Fit a new air filter.
Cause:
•
Air filter damaged or missing.
•
Parts from the carburettor or intake
system have come loose and
entered the engine.
Action:
Fit a new air filter.
Regular service and inspection.
Larger, harder particles that enter the engine cause serious damage to the under-
side of the piston skirt.
Summary of Contents for 333R
Page 1: ...Workshop manual 333R 335R English ...
Page 2: ......
Page 36: ...34 4 Centrifugal clutch ...
Page 40: ...38 5 Angle gear ...
Page 50: ...48 6 Cylinder and piston ...
Page 60: ......
Page 61: ......
Page 62: ...2005W23 115 00 92 26 ...