Honda CRF450RX 2019
Cross Country / Hare Scramble / Racing
450cc
4-stroke
53.7hp
Measured power
255lb
Curb weight
37.8in
Seat height
12in
Front travel
2019 Honda CRF450RX overview
The 2019 Honda CRF450RX is Honda's closed-course off-road racer: the CRF450R motocross bike adapted for cross-country, GNCC-style and hare scramble racing, with its own ECU map and suspension settings, an 18-inch rear wheel, Dunlop AT81 tires (90/90-21 front), an aluminum sidestand and a bigger 2.25-gallon fuel tank. Its fuel-injected, liquid-cooled 450cc single has a Unicam SOHC four-valve head, electric start and a five-speed gearbox with a cable-operated clutch, plus HRC Launch Control and a handlebar map switch. For 2019 it got the CRF450R's updates: a revised cylinder head, bigger exhaust pipes, a lighter frame and swingarm, a new front brake caliper, HRC Launch Control, a Renthal Fatbar handlebar with adjustable mounts, and new ECU and suspension settings.
Who it's for
For experienced riders who race cross-country, GNCC-style and hare scramble events on closed courses and want a 450 four-stroke set up for woods and rough terrain rather than a motocross track. It is a competition-only bike: not street legal in the US, and not meant for beginners.
Quick facts
- The 2019 Honda CRF450RX has a 450cc fuel-injected 4-stroke engine, a 5-speed gearbox and electric start.
- The 2019 CRF450RX weighs 255 lb ready to ride and has a 37.8 in seat height.
- The 2019 CRF450RX runs 90/90-21 front and 120/90-18 rear tires.
- The 2019 CRF450RX takes 1.1 US qt (1.0 L) of 10W-30 engine oil; change it every 4 races or about 15 hours.
- The 2019 CRF450RX lists at $9,599 (US MSRP). It is not street legal in the US.
2019 Honda CRF450RX specifications
Engine
- Displacement
- 450cc
- Stroke
- 4-stroke
- Fuel system
- Fuel injection
- Bore × stroke
- 96 × 62.1 mm
- Compression
- 13.5:1
- Power (measured)
- 53.7 hp at the rear wheel
- Cooling
- Liquid
- Configuration
- Single-cylinder
- Valve train
- SOHC
- Valves
- 4
- Engine oil
- 1.1 US qt (1.0 L)
- Oil type
- 10W-30
- Coolant
- 1.1 US qt (1.07 L)
Clutch
- Type
- Wet multiplate
- Actuation
- Cable
Drivetrain
- Starting
- Electric
- Transmission
- 5-speed
- Chain size
- 520
- Chain links
- 114
- Front sprocket
- 13T
- Rear sprocket
- 50T
Dimensions
- Seat height
- 37.8″
- Ground clearance
- 12.9″
- Wheelbase
- 58.1″
- Width
- 32.6″
- Height
- 49.6″
- Length
- 85.6″
- Curb weight
- 255 lb
- Fuel capacity
- 2.25 gal
Price & warranty
- Colors
- Red
Equipment
- HRC Launch Control
- Standard
- Sidestand
- Standard
Frame & steering
- Frame material
- Aluminum
- Rake
- 27.4°
- Trail
- 4.6″
Suspension
- Front
- 49 mm inverted Showa coil-spring fork
- Front travel
- 12″
- Rear
- Pro-Link Showa single shock
- Rear travel
- 12.3″
Wheels & tires
- Front wheel
- 21″
- Rear wheel
- 18″
- Front tire
- Dunlop AT81F 90/90-21 54M
- Rear tire
- Dunlop AT81 120/90-18 65M
Brakes
- Front disc
- 260 mm
- Rear disc
- 240 mm
Stock features
- Map switch
- Yes
- Skid plate
- Yes
- Street legal (US)
- No
Battery / electrical
- Battery
- Yes
- OEM battery
- HY85S
- Chemistry
- Lithium
- Voltage
- 12V
- Capacity
- 2 Ah
2019 Honda CRF450RX maintenance
From the maker's manuals. Tap a row to see the manual page.
Service intervals
- Change engine oil
- Every 4 races or about 15 hours
- Replace oil filter
- Every 4 races or about 15 hours
- Clean air filter
- Every race or about 3.5 hours
- Inspect spark plug
- Every race or about 3.5 hours
- Change engine oil (first time)
- After the first break-in ride
- Replace oil filter (first time)
- After the first break-in ride
Spark plug
- Spark plug
- NGK SILMAR9A-9S
- Plug gap
- 0.031 – 0.035 in (0.80 – 0.90 mm)
- Spark plug (optional)
- NGK SILMAR10A-9S
Torque specs
- Oil drain bolt
- 13 ft‑lb (18 N·m, 1.8 kgf·m)
- Oil filter cover bolts
- 7.4 ft‑lb (10 N·m, 1.0 kgf·m)
- Front axle nut
- 65 ft‑lb (88 N·m, 9.0 kgf·m)
- Front axle pinch bolts
- 15 ft‑lb (20 N·m, 2.0 kgf·m)
- Rear axle nut
- 94 ft‑lb (128 N·m, 13.1 kgf·m)
- Upper triple clamp bolts
- 16 ft‑lb (22 N·m, 2.2 kgf·m)
- Lower triple clamp bolts
- 15 ft‑lb (20 N·m, 2.0 kgf·m)
- Steering stem nut
- 80 ft‑lb (108 N·m, 11.0 kgf·m)
- Handlebar clamp bolts
- 16 ft‑lb (22 N·m, 2.2 kgf·m)
- Front brake caliper mounting bolts
- 22 ft‑lb (30 N·m, 3.1 kgf·m)
- Front brake disc nuts
- 12 ft‑lb (16 N·m, 1.6 kgf·m)
- Rear brake disc nuts
- 12 ft‑lb (16 N·m, 1.6 kgf·m)
- Rear sprocket nuts
- 24 ft‑lb (32 N·m, 3.3 kgf·m)
- Front sprocket bolt
- 23 ft‑lb (31 N·m, 3.2 kgf·m)
- Chain adjuster locknut
- 20 ft‑lb (27 N·m, 2.8 kgf·m)
- Shock absorber mounting bolts
- 32 ft‑lb (44 N·m, 4.5 kgf·m)
- Coolant drain bolt
- 7.4 ft‑lb (10 N·m, 1.0 kgf·m)
2019 Honda CRF450RX vs 2018
Of the specs below, the 2019 Honda CRF450RX has a $350 higher MSRP, is 2 lb lighter and adds HRC Launch Control, compared with the 2018 model.
| Spec | 2018 | 2019 | Changed |
|---|---|---|---|
| MSRP | $9,249 | $9,599 | New |
| Displacement | 450cc | Same | |
| Curb weight | 257 lb | 255 lb | New |
| Seat height | 37.8 in | Same | |
| Front travel | 12 in | Same | |
| Rear travel | 12.3 in | Same | |
| Fuel | 2.25 gal | Same | |
| Gearbox | 5-speed | Same | |
| Front tire | Dunlop AT81F 90/90-21 54M | Same | |
| Rear tire | Dunlop AT81 120/90-18 65M | Same | |
| HRC Launch Control | — | Standard | New |
2019 Honda CRF450RX photos
Honda CRF450RX FAQ
How much power does the 2019 Honda CRF450RX make?
Dirt Rider measured 53.7 hp on its dyno.
What engine does the 2019 Honda CRF450RX have?
A fuel-injected, liquid-cooled 450cc single-cylinder four-stroke with a Unicam SOHC four-valve head and a five-speed gearbox.
How is the 2019 Honda CRF450RX different from the CRF450R?
It has its own ECU map and off-road suspension settings, a 90/90-21 front tire and an 18-inch rear wheel with Dunlop AT81 tires (the CRF450R runs an 80/100-21 front and a 19-inch rear). It also has an aluminum sidestand and a bigger 2.25-gallon fuel tank.
What is the seat height of the 2019 Honda CRF450RX?
37.8 in.
How much does the 2019 Honda CRF450RX weigh?
Honda lists a curb weight of 255 lb, ready to ride with a full tank.
How much suspension travel does the 2019 Honda CRF450RX have?
12.0 in at the front and 12.3 in at the rear.
How much fuel does the 2019 Honda CRF450RX hold?
2.25 US gal (8.5 L).
What oil does the 2019 Honda CRF450RX take?
SAE 10W-30 motorcycle oil (JASO MA), 1.1 US qt (1.0 L) after draining.
Is the 2019 Honda CRF450RX street legal?
No. It is sold for closed-course competition only and is not street legal in the US.
What was the MSRP of the 2019 Honda CRF450RX?
$9,599.
What size tires does the 2019 Honda CRF450RX use?
90/90-21 front and 120/90-18 rear.
What spark plug does the 2019 Honda CRF450RX take?
NGK SILMAR9A-9S, gapped 0.031 – 0.035 in (0.80 – 0.90 mm).
What chain and sprockets does the 2019 Honda CRF450RX use?
A 520 chain with 114 links on a 13-tooth front and 50-tooth rear sprocket.
Is the 2019 Honda CRF450RX different from the 2018 model?
Among the main specs, the 2019 Honda CRF450RX has a $350 higher MSRP, is 2 lb lighter and adds HRC Launch Control, compared with the 2018 model.
Other Honda CRF450RX model years
Specs from Honda's owner's manual, Honda's website and published spec sheets. Updated .