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Honda CRF450RL 2021 Owner's Manual & Off-Road Handbook page 82

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Maintenance
Minor adjustments can be made at the cable end adjuster
[1].
Turning the cable end adjuster in direction (+) will
increase freeplay and turning it in direction (–) will
decrease freeplay.
If the adjuster is threaded out near its limit and the correct
freeplay cannot be reached, turn the adjuster in direction
(+) until it seats lightly and then turn it out 5 turn in
direction (–).
Make the adjustment with the in-line cable adjuster.
[1]
(–)
Major adjustments can be made with the in-line cable
adjuster [1].
Loosen the adjuster lock nut [2] and turn the adjuster.
Turning the adjuster in direction (+) will increase freeplay
and turning it in direction (–) will decrease freeplay.
After adjustment, tighten the adjuster lock nut securely
while holding the adjuster.
Test ride to be sure the clutch operates properly without
slipping or dragging.
If proper freeplay cannot be obtained using both
procedures or the clutch slips during the test ride,
disassemble and inspect the clutch 2-55.
[1]
(–)
2-56
(+)
(+)
[2]
CLUTCH INSPECTION
Drain the engine oil 2-32.
Remove the right crankcase over cover 1-9.
Loosen the clutch cover bolt (long) [1] and clutch cover
bolts (short) [2] in a crisscross pattern in two or three
steps.
Remove the bolts, clutch cover [3] and O-ring [4].
[1]
[2]
[3]/[4]
Loosen the clutch spring bolts/washers [1] in a crisscross
pattern in two or three steps.
Remove the bolt/washers, and clutch springs [2].
Remove the clutch pressure plate [3].
[3]
[1]/[2]

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Crf450l