Honda 450X 2005 Owner's Manual & Competition Handbook page 77

8. Remove the tensioner stopper (15) from the
cam chain tensioner lifter.
(15) tensioner stopper
9. Install a new sealing washer (16) and cam
chain tensioner lifter cover bolt (17).
(16)
(16) sealing wahser
(17) cam chain tensioner lifter cover bolt
10. After installing the cam shaft assembly,
perform the valve clearance and
decompressor arm clearance inspection.
Decompressor Arm Clearance
Adjustment
1. Make sure that the piston is at top dead center
on the compression stroke (page 55).
Measure the right exhaust valve clearance by
inserting a feeler gauge (1) between the right
side rocker arm (2) and shim (3).
Right Exhaust Valve Clearance:
0.011 ± 0.001 in (0.28 ± 0.03 mm)
(15)
(17)
(1) feeler gauge
(2) right side rocker arm
2. Pull out the feeler gauge.
(2)
(1)
(3)
(3) shim
Valve Clearance
3. Loosen the lock nut (4) and adjusting screw
(5).
Insert the feeler gauge (1) between the
adjusting screw and right side rocker arm (7).
DECOMPRESSOR CLEARANCE:
RIGHT EXHAUST VALVE CLEARANCE
+
0.014 IN (0.35 mm)
Example:
If measured right exhaust valve clearance is
0.011 in (0.28 mm), decompressor clearance is;
0.011 in (0.28 mm) + 0.014 in (0.35 mm)
= 0.025 in (0.63 mm)
Turn the adjusting screw until there is a slight
drag on the feeler gauge.
Hold the adjusting screw and tighten the lock
nut to the specified torque:
7 lbf·ft (10 N·m, 1.0 kgf·m)
(5)
(6)
(1)
(1) feeler gauge (5) adjusting screw
(4) lock nut (6) right side rocker arm
Recheck the decompressor arm clearance.
Servicing Your Honda
(4)
73