Decompressor Clearance Inspection/Adjustment - Honda TRX450R Service Manual

MAINTENANCE
'04 - '05:
After '05:
DECOMPRESSOR CLEARANCE
INSPECTION/ADJUSTMENT
NOTE:
• Always inspect and adjust the decompressor
clearance after inspecting and adjusting the
valve clearance (page 4-10).
Rotate the crankshaft clockwise and align the punch
mark on the primary drive gear with the index mark
on the right crankcase cover.
Make sure the piston is at TDC (Top Dead Center) on
the compression stroke.
Measure the decompressor clearance by inserting a
feeler gauge between the decompressor arm adjust-
ing screw and right side rocker arm.
DECOMPRESSOR CLEARANCE:
Right side exhaust valve clearance + 0.15 ± 0.02
mm (0.006 ± 0.001 in)
DECOMPRESSOR CLEARANCE:
Right side exhaust valve clearance + 0.25 ± 0.02
mm (0.010 ± 0.001 in)
For example, if the measured right side exhaust
valve clearance is 0.28 mm (0.011 in), decompressor
clearance is;
0.28 mm (0.011 in) + 0.15 mm (0.006 in) = 0.43 ±0.02
mm (0.017 + 0.001 in)
If the decompressor clearance is out of specifica-
tion, adjust as follows:
Measure the right exhaust valve clearance by insert-
ing a feeler gauge between the right side rocker arm
and shim.
EXHAUST VALVE CLEARANCE:
0.28 ± 0.03 mm (0.011 ± 0.001 in)
Remove the feeler gauge inserted between the right
side rocker arm and shim.
INDEX MARK
DECOMPRESSOR LIFTER ARM
4-13