Honda CRF450R 2006, Owner'S Manual

Page: 67 / 172

Valve Clearance
Servicing Your Honda
63
12.Measure the decompressor arm clearance by
inserting a feeler gauge (16) between the
decompressor arm adjusting screw (19) and
right side rocker arm (20).
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)
(19)
(16)
(20)
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:
EX: 0.011 ± 0.001 in (0.28 ± 0.03 mm)
(1) feeler gauge (3) shim
(2) right side rocker arm
2. Pull out the feeler gauge between the right
side rocker arm and shim.
(2)
(3)
(1)
3. Loosen the lock nut (4) and decompressor arm
adjusting screw (5).
Insert the feeler gauge (1) between the
adjusting screw and right side rocker arm (6).
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)
(1) feeler gauge
(4) lock nut
(5) decompressor arm adjusting screw
(6) right side rocker arm
Recheck the clearance between the adjusting
screw and right side rocker arm.
(5)
(6) (4)
(1)
(16) feeler gauge
(19) decompressor arm adjusting screw
(20) right side rocker arm