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2-24 PERIODIC MAINTENANCE
Periodic Maintenance Procedures
Valve Clearance Inspection
NOTE
○
Valve clearance must be checked and adjusted when
the engine is cold (at room temperature).
•
Remove:
Lower Fairings (see Frame chapter)
Pickup Coil Cover
Cylinder Head Cover (see Cylinder Head Cover Re-
moval)
•
Position the crankshaft at 1,4 piston TDC.
TDC Mark [A] for #1, 4 Pistons
Timi
ng Mark [B]
•
Using a thickness gauge [A], measure the valve clearance
between the cam and the valve lifter.
Valve Clearance
Standard:
IN:
0.15 ∼ 0.24 mm (0.0059 ∼ 0.0094 in.)
EX: 0.22 ∼ 0.31 mm (0.0087 ∼ 0.0122 in.)
○
When positioning #4 piston TDC at the end of the
compression stroke:
Inlet valve clearance of #2 and #4 cylinders
Exhaust valve clearance of #3 and #4 cylinders
Measuring Valve [A]
○
When positioning #1 piston TDC at the end of the
compression stroke:
Inlet valve clearance of #1 and #3 cylinders
Exhaust valve clearance of #1 and #2 cylinders
Measuring Valve [A]
If the valve clearance is not within the specified range,
first record the clearance, and then adjust it.