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Transmission Oil
Refer to Safety Precautions on page 19.
Using the proper oil, and regularly checking,
adding, and changing oil will help extend the
service life of the transmission and clutch. Even
the best oil wears out. Changing oil helps get rid
of dirt and deposits. Operating the engine with
old or dirty oil can damage your engine.
Running the engine with insufficient oil can
cause serious damage to the engine and
transmission.
Oil Recommendation
• Your CRF does not need oil additives. Use the
recommended oil.
• Do not use oils with graphite or molybdenum
additives. They may adversely affect clutch
operation.
• Do not use API SH or higher 4-stroke engine
oils displaying a circular API “energy
conserving” service label on the container. They
may affect lubrication and clutch performance.
Servicing Your Honda 39
* Suggested 4-stroke engine oils are equal
performance to SJ oils that are not labeled as
energy conserving on the circular API service
label.
Other viscosities shown in the following chart
may be used when the average temperature in
your riding area is within the indicated range.
NOT RECOMMENDED OK
API classification
(4-stroke engine oil
only)
Viscosity
(weight)
JASO T903
standard
others
suggested oil
*
SG or higher except oils
labeled as energy
conserving on the circular
API service label
SAE 10W–30
MA
without friction modifiers as
molybdenum additives
Pro Honda GN4 4-stroke oil
or an equivalent
*
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