Service Manual

2-10 PERIODIC MAINTENANCE
Periodic Maintenance Procedures
Air Cleaner Housing (Cap and Body) Inspection
FX Models
•
Remove:
Elements (see Element Removal in the Fuel System
chapter)
Air Cleaner Housing (see Air Cleaner Body and Bracket
Removal in the Fuel System chapter)
•
Clean the housing with detergent and water and dry the
housing thoroughly.
•
Check the housing for deformation or other damage.
○
Seal the housing well and permit only filtered air to reach
the carburetor.
If the housing is damaged, replace the housing with a new
one.
•
Check that no foreign material is obstructing the air pas-
sage.
Engine Top End
Cylinder Head Cleaning
•
Scrape the carbon deposits from the cylinder head and
the exhaust port with a suitable tool [A
].
○
To avoid gouging, use scrapers that are made of a mate-
rial that will not cause damage.
•
Clean the head in a bath of high-flas
h point solvent and
dry it with compressed air.
WARNING
Clean the cylinder head in a well-ventilated area,
and take care that there are no sparks or flame any-
where near the working area; this includes any ap-
pliance with a pilot light. Do not use gasoline or a
low-flash point solvent to clean the cylinder head.
A fire or explosion could result.
Valve Clearance Inspection
NOTE
○
Valve clearance must be checked when the engine is
cold (at room temperature).
•
Remove the rocker covers (see Cylinder Head Assembly
Removal in the Engine Top End chapter).
•
Place the piston at the top dead center (TDC) of the com-
pression stroke by turning the crankshaft clockwise facing
the flywheel.