Honda CRF450RX 2020 User Manual

Wheels
118 Servicing Your Honda
Wheels
Refer to Important Safety Precautions on page 23.
Keeping the wheels true (round) and maintaining
correct spoke tension are critical to safe
motorcycle operation. During the first few rides,
spokes will loosen more rapidly due to the initial
seating of the parts. Excessively loose spokes may
result in instability at high speeds and the possible
loss of control. It’s also important that the rim
locks are secure to prevent tire slippage.
1. Inspect the wheel rims (1) and spokes (2) for
damage.
2. Tighten, any loose spokes and rim locks (3) to
the specified torque:
Spokes: 2.7 lbf·ft (3.7 N·m, 0.4 kgf·m)
Rim Locks: 9 lbf·ft (12 N·m, 1.2 kgf·m)
3. Check wheel rim runout. If runout is
noticeable, see an official Honda Service
Manual for inspection instructions.
See an official Honda Service Manual for
inspection information:
1. Check the axle shaft for runout.
2. Check the condition of the wheel bearings.
Wheel Rims & Spokes
(1) wheel rim (3) rim lock
(2) spokes
(2)
(3)
(1)
Axles & Wheel Bearings

Honda CRF450RX 2020 Specifications

General

Engine Type	449cc liquid-cooled single-cylinder four-stroke
Bore x Stroke	96.0mm x 62.1mm
Compression Ratio	13.5:1
Induction	Programmed Fuel Injection (PGM-FI), 46mm throttle body
Ignition	Full transistorized ignition
Transmission	5-speed
Final Drive	Chain
Front Brake	Single 260mm disc with twin-piston caliper
Rear Brake	Single 240mm disc
Front Tire	80/100-21
Rear Tire	120/80-18
Wheelbase	58.3 inches
Seat Height	37.8 inches
Ground Clearance	12.9 inches
Starter	Electric
Trail	4.6 inches
Front Suspension	49mm inverted fork with rebound and compression damping adjustability; 12.0 inches travel
Rear Suspension	12.4 inches of travel
Valve Train	Unicam, four-valve