ID # 31207040

2024 Honda CRF450RX

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Overview

450 cc Unicam Engine

Honda Unicam cylinder heads combine the best of single- and double-overhead-cam designs. The configuration contributes to a compact engine that saves weight over a comparable dual-overhead-camshaft motor and also permits a narrow included valve angle. This flattens the combustion chamber to facilitate ignition flame propagation, allowing a high compression ratio. Since less space is taken up in the cylinder head, the camshaft sits lower in the head for a more compact engine and a lower center of gravity.
Specifications
Model
CRF450RX
Category Name
Motorcycles
Year
2024
Sale Type
New
Manufacturer
Honda
Color
Extreme Red
Engine Size
449 cc
Tires
Front: 90/90 - 21 Rear: 120/90 - 18
Brakes
Front: 260 mm disc Rear: 240 mm disc
Wheelbase
1,477 mm (58.1 in)
Curb Weight
114 kg (251 lb.)
Engine Type
Liquid-cooled single-cylinder
Final Drive
#520 chain; 13T/50T
Seat Height
961 mm (37.8 in)
Valve Train
Unicam, 4 valves
Transmission
Five-speed
Bore & Stroke
96 mm x 62.1 mm
Fuel Delivery
PGM-FI electronic fuel injection with 44 mm throttle bore
Fuel Capacity
8 litres
Rear Suspension
Pro-Link® system; fully adjustable Showa single shock; 313 mm (12.3 in) travel
Front Suspension
49 mm inverted Showa fork with rebound and compression damping adjustability; 273 mm (10.7 in) travel.
Ground Clearance
334 mm (13.1 in)
Compression Ratio
13.5:1
engine and electronics

450 cc Unicam Engine

Honda Unicam cylinder heads combine the best of single- and double-overhead-cam designs. The configuration contributes to a compact engine that saves weight over a comparable dual-overhead-camshaft motor and also permits a narrow included valve angle. This flattens the combustion chamber to facilitate ignition flame propagation, allowing a high compression ratio. Since less space is taken up in the cylinder head, the camshaft sits lower in the head for a more compact engine and a lower center of gravity.

Hydraulic Clutch

Big power requires a strong clutch, and this bike delivers with a smooth-operating hydraulic clutch. Ditching the cable improves consistency, control and feel at the lever. The clutch capacity is generous, along with an extra plate and spring to maximize power transfer and durability.

Electric Start

Kickstarting? Maybe if you’re riding in the vintage class, but not here. By ditching the kickstarter entirely, our engineers were able to make a light bike even lighter. Electric starters and lithium-ion batteries are so light now and so good that putting them on a bike like this is a win/win combination. And winning is what a CRF450R-series bike is all about.

Honda Selectable Torque Control (HSTC)

Honda Selectable Torque Control (HSTC) works to minimize rear wheel spin (thus wasted forward drive) and maximize traction. It doesn’t use a wheel-speed sensor, and, importantly, maintains feel at the throttle while managing power — ignition timing and the PGM-FI system are adjusted when the rate of change of RPM goes over a set amount. With three settings plus off to choose from, you can have your bike dialed no matter how much traction there is.

HRC Launch Control

We’re talking about a special ECU program here: push the button to select the mode, hold the throttle open, release the clutch, and the bike will do the rest, launching you into the first turn with a big advantage.

Engine Mode Select Button

This simple handlebar-mounted button lets you dial in engine power delivery character with a push of your thumb. Choose between Standard, Smooth and Aggressive, depending on track conditions.
chassis & suspension

Strong Frame Minimizes Fatigue

The CRF450RX is focused on being fast while minimizing rider fatigue. They achieved this through optimizing frame rigidity working seamlesly with the suspension to prioritize traction, stability and bump absorption.

Single-pipe Exhaust

The CRF450RX uses a single-pipe header. It routes close to the center of the bike, and its light overall construction helps improve weight distribution. The single muffler uses a pressed-alloy design that lets us shape the muffler body for better rider ergonomics and lighter weight.

Showa Spring Fork

The 49 mm Showa fork features a conventional spring design that helps increase the CRF450RX’s front-suspension precision, handling and feel. The spring rate provides better bottoming resistance and improved handling.
additional features

High-Capacity Resin Fuel Tank

For longer cross-country loops, the CRF450RX features a fuel tank that holds a full 8 litres.

Hand Guards

When the going gets extra tough, you’ll appreciate the hand guards on to the CRF450RX.

Sealed Airbox and Filter

Along with the special air filter, the airbox shape helps deliver more torque. You can access the airbox through the left number plate. And because the CRF450RX’s filter has no rubber gasket where it interfaces with the intake boot, cleaning and servicing the filter is faster and less messy.