Honda CRF450X, Owner'S Manual

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Clutch System
Clutch Disc/Plate Inspection
Check the clutch discs (1) for signs of scoring or
discolouration.
Measure the thickness of each clutch disc.
Service Limit:
2.85 mm (0.112 in)
Replace the clutch discs and plates as a set.
(1) clutch disc
Check the clutch plates (2) for excessive warpage
or discolouration.
Check the plate warpage on a surface plate using
a feeler gauge.
Measure the thickness of each clutch plate.
Service Limit:
0.15 mm (0.006 in)
Replace the clutch discs and plates as a set.
(1)
Clutch Spring Inspection
(1) clutch spring
Measure the free length of each spring.
Service Limit:
43.7 mm (1.72 in)
Replace the clutch springs as a set if any one of
them is beyond the service limit or if the clutch
plates have been burnt/heat discoloured.
(1)
58
Servicing Your Honda
6. Remove the washer (11), needle bearing (12),
clutch lifter (13) and clutch lifter rod (14).
7. Remove the eight clutch discs and seven
clutch plates (15).
Assemble the clutch lifter, needle bearing and
washer. Turn the needle bearing with your
finger. The needle bearing should turn
smoothly and quietly. Replace the needle
bearing and washer if the needle bearing does
not turn smoothly.
(11) washer (14) clutch lifter rod
(12) needle bearing (15) clutch discs/clutch plates
(13) clutch lifter
(13)
(14)
(15)
(11)
(12)
(2)
(2) clutch plate
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