Valve Clearance Adjustment - Honda TRX450R Service Manual

MAINTENANCE
Record the
clearance of each
valve for reference
in shim selection if
adjustment is
required.
Record the
clearance of each
valve for reference
in shim selection if
adjustment is
required.
The shims can be
easily removed with
tweezers or a
magnet.
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.
INDEX MARK
Measure the clearance of each intake valve by
inserting a feeler gauge between the valve lifter and
cam lobe.
INTAKE VALVE CLEARANCE:
0.16 ± 0.03 mm (0.006 ± 0.001 in)
Measure the clearance of each exhaust valve by
inserting a feeler gauge between the rocker arm and
shim.
EXHAUST VALVE CLEARANCE:
0.28 ± 0.03 mm (0.011 ± 0.001 in)
VALVE CLEARANCE ADJUSTMENT
Remove the camshaft holder assembly and valve
lifters (page 11-8).
NOTE:
• The shims may stick to the inside of the valve
lifter. Do not allow the shims to fall into the
crankcase.
Remove the shims.
Mark all valve lifters and shims to ensure correct
reassembly in their original locations.
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