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Honda CRF450RX 2020 User Manual

Honda CRF450RX 2020
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Clutch System
Servicing Your Honda 73
Clutch System
Refer to Important Safety Precautions on page 23.
Inspection
Check freeplay (1).
Freeplay: 3/8 – 13/16 in (10 – 20 mm)
If necessary, adjust to the specified range.
Improper freeplay adjustment can cause premature
clutch wear.
Make sure to adjust the clutch lever freeplay after
the clutch cable is disconnected.
Cable End Adjustment
Minor adjustments are generally made with the
clutch cable end adjuster.
Turning the clutch cable end adjuster (1) in
direction (+) will increase freeplay and turning it in
direction (–) will decrease freeplay.
If the adjuster is threaded out near its limit or the
correct freeplay cannot be reached, turn the
adjuster all the way in and back out five turns and
make the adjustment with the integral cable
adjuster.
Integral Cable Adjustment
The integral cable adjuster is used if the cable end
adjuster is threaded out near its limit — or the
correct freeplay cannot be obtained.
1. Turn the cable end adjuster in direction (+)
until it seats lightly and then turn it out five
turns.
2. Loosen the lock nut (1).
3. Slide the rubber boot (2) off and turn the
integral cable adjuster (3) to obtain the
specified freeplay.
4. Once the specified freeplay has been obtain,
slide the rubber boot on and tighten the lock
nut.
5. Start the engine, pull the clutch lever in, and
shift into gear. Make sure the engine does not
stall and the motorcycle does not creep.
Gradually release the clutch lever and open the
throttle. Your CRF should move smoothly and
accelerate gradually.
If you can’t get proper adjustment, or the clutch
does not work properly, the cable may be kinked or
worn, or the clutch discs may be worn.
Inspect the clutch discs and plates (page 76).
Clutch Lever Freeplay
(1) freeplay
(1)
(1) clutch cable end adjuster
(+) increase freeplay
(–) decrease freeplay
(1)
(–)
(+)
(1) lock nut (+) increase freeplay
(2) rubber boot (–) decrease freeplay
(3) integral cable adjuster
(1)
(–)
(+)
(3)
(2)

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Honda CRF450RX 2020 Specifications

General IconGeneral
Engine Type449cc liquid-cooled single-cylinder four-stroke
Bore x Stroke96.0mm x 62.1mm
Compression Ratio13.5:1
InductionProgrammed Fuel Injection (PGM-FI), 46mm throttle body
IgnitionFull transistorized ignition
Transmission5-speed
Final DriveChain
Front BrakeSingle 260mm disc with twin-piston caliper
Rear BrakeSingle 240mm disc
Front Tire80/100-21
Rear Tire120/80-18
Wheelbase58.3 inches
Seat Height37.8 inches
Ground Clearance12.9 inches
StarterElectric
Trail4.6 inches
Front Suspension49mm inverted fork with rebound and compression damping adjustability; 12.0 inches travel
Rear Suspension12.4 inches of travel
Valve TrainUnicam, four-valve

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