Honda 450X 2005 Owner's Manual & Competition Handbook page 72

Valve Clearance
Measure the decompressor arm clearance by
inserting a feeler gauge (1) between the
decompressor arm adjusting screw (6) and right
side rocker arm (7).
(6)
(7)
(1) feeler gauge
(6) decompressor arm adjusting screw
(7) right side rocker arm
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)
If only decompressor arm clearance needs
adjustment, see Decompressor Arm clearance
Adjustment (page 73).
68
Servicing Your Honda
Camshaft Holder Assembly Removal
1. Record the intake valve clearance, exhaust
valve clearance and decompressor arm
clearance.
2. Remove the cam chain tensioner lifter cover
bolt (1) and sealing washer (2).
(1)
(1) cam chain tensioner lifter cover bolt
(2) sealing washer
(2)
(1)
Use the tensioner stopper tool.
• Tensioner stopper
3. Turn the tensioner shaft clockwise with the
tensioner stopper (3) until it stops, in order to
retract the tensioner fully.
Then insert the tensioner stopper fully to hold
the stopper in the fully retracted position.
(3)
(3) tensioner stopper
070MG-0010100