Honda CRF450RX 2020 User Manual

18 Basic Operating Instructions
Starting & Stopping the Engine
Warm Engine Starting
1. Shift the transmission into neutral.
2. Pull the clutch lever and depress the start
button. (Do not open the throttle.)
Starting the engine excessively charged with fuel
by throttle blipping or other reasons
1. Shift the transmission into neutral.
2. With the throttle fully opened, pull the clutch
and depress the start button for 5 seconds to
discharge excessive fuel from the engine.
3. Pull the clutch lever and depress the start
button. (Do not open the throttle.)
Snapping the throttle or fast idling for more than
about 5 minutes may cause exhaust pipe and
muffler discolorations.
When starting the engine, the MIL (amber) will
stay on for 2 seconds, then go off. And then the
engine mode indicator (blue) indicates the current
engine mode for 0.8 seconds, then goes off. If the
MIL/engine mode indicator (1) does not come on
or go off when it should, have your dealer check it
for problems.
Normal Engine Stop
1. Shift the transmission into neutral.
2. Push and hold the engine stop button (1) until
the engine stops completely.
Emergency Engine Stop
To stop the engine in an emergency, push and hold
the engine stop button.
(1) MIL (amber) / engine mode indicator (blue)
(1)
How to Stop the Engine
(1) engine stop button
(1)

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