Honda CRF450RX 2020 User Manual

Before & After Competition Maintenance
Servicing Your Honda 31
Before & After Competition Maintenance
After practice or between races (CRF450RX)/
motos (CRF450R/RWE) you have a chance to
make additional checks and adjustments.
• Clean accumulated dirt from under the fenders
and off the wheels, suspension components,
handgrips, controls, and footpegs. A stiff,
nylon parts cleaning brush works well.
• Check tire air pressure.
• Check spoke tension, and make sure the rim
locks are secure.
• Check to make sure the sprocket bolts and nuts
are secure.
• Clean the sides of the drive chain with a stiff,
nylon parts-cleaning brush. Lubricate and
adjust the chain as necessary.
Do not perform maintenance while engine is
running. Injury to your fingers or hands may result.
• After adjustment, check that the chain adjuster
index marks (1) are in the same position on
each side. This will ensure that the rear wheel
is in proper alignment and allow maximum
performance from the rear disc brake.
Maintaining proper wheel alignment will also
extend brake pad lifespan.
• Suspend the front wheel above the ground and
use the pressure release screws (2) to release
the built-up pressure in the forks. This pressure
is caused by normal fork action while riding.
Between Races (CRF450RX)/Motos
(CRF450R/RWE) & Practice
Maintenance
(1) chain adjuster index marks
(1)
(2) pressure release screw
(2)

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