Periodic Maintenance Procedures
Turn the camshaft sprocket plate [A] counterclockwise and align the
line [B] on the camshaft sprocket with the projection [C] on the mating
surface of the cylinder head.
Measure the clearance of each valve by inserting a thickness gauge
[A] between the adjusting screw and the valve stem.
If a valve clearance is incorrect, adjust it.
Install the other removed parts.
Valve Clearance Adjustment
Use a valve adjusting screw holder [A] to holding the valve adjusting
screw [B], loosen the adjusting screw locknut [C] and insert the 0.05
mm thickness gauge between valve and adjusting screw and turn the
adjusting screw until the adjusting screw stops.
Special Tools - Valve Adjusting Screw Holder: 57001–1217
Tighten the locknut.
Adjusting Screw Locknut: 8.8 N
Remove the thickness gauge.
Spark Arrester Cleaning
To avoid burns, be sure the exhaust system is cold before
cleaning the spark arrester. The exhaust system becomes very
hot soon after the engine is started.
Remove the mufﬂer cover.
Unscrew the mounting bolts [A] and pull out the spark arrester [B].
Scrape carbon deposits off the spark arrester [A].
m (0.9 kgf
m, 78 in
PERIODIC MAINTENANCE 2-7