Honda CRF450RX 2020 User Manual

Specifications
(cont’d)
Technical Information 173
Specifications
Item English Metric
Dimension
Overall length
CRF450RX:
85.6 in
CRF450R/RWE:
85.9 in
CRF450RX:
2,175 mm
CRF450R/RWE:
2,183 mm
Overall width 32.6 in 827 mm
Overall height 49.6 in
CRF450RX:
1,259 mm
CRF450R/RWE:
1,260 mm
Wheelbase
CRF450RX:
58.1 in
CRF450R/RWE:
58.3 in
CRF450RX:
1,477 mm
CRF450R/RWE:
1,482 mm
Seat height 37.8 in
CRF450RX:
959 mm
CRF450R/RWE:
960 mm
Footpeg height
CRF450RX:
16.4 in
CRF450R/RWE:
16.5 in
CRF450RX:
417 mm
CRF450R/RWE:
418 mm
Ground clearance 12.9 in 328 mm
Frame
Type Twin tube
F. su
spension
Telescopic fork,
travel 10.55 in (268 mm)
stroke 12.01 in (305 mm)
R. suspe
nsion
Pro-link,
CRF450RX:
travel 12.28 in (312 mm)
CRF450R/RWE:
travel 12.36 in (314 mm)
Tire size, front
CRF450RX: 90/90-21 54M
CRF450R/RWE: 80/100-21 51M
DUNLOP
CRF450RX:
AT81F
CRF450R/RWE:
MX3SF
Tire size, rear
CRF450RX: 120/90-18 65M
CRF450R/RWE: 120/80-19 63M
DUNLOP
CRF450RX:
AT81
CRF450R/RWE:
MX3S
Tire type bias-ply, tube
Tire pressure, front
(cold)
15 psi (100 kPa, 1.0 kgf/cm
2
)
Tire pressure, rear
(cold)
15 psi (100 kPa, 1.0 kgf/cm
2
)
F.
bra
ke, swept area
Single disc brake
56.0 in
2
(361.0 cm
2
)
R.
brake,
swep
t
area
Si
ngle disc brake
60.5 in
2
(390.3 cm
2
)
Fuel
unleaded gasoline, pump octane
number of 91 or higher
Fuel tank capacity
CRF450RX:
2.25 US gal
CRF450R/RWE:
1.66 US gal
CRF450RX:
8.5 ℓ
CRF450R/RWE:
6.3 ℓ
Caster angle
CRF450RX: 27°26’
CRF450R/RWE: 27°22’
Trail length 4.6 in 116 mm
Fork oil capacity
(except damper)
CRF450RX:
12.3 US oz
CRF450R/RWE:
12.0 US oz
CRF450RX:
363 cm
3
CRF450R/RWE:
356 cm
3
Fork oil capacity
(damper)
8.2 US oz 243 cm
3
Item English Metric
Engine
Type Liquid cooled, 4-stroke
Cylinder
arrangement
Single 10° inclined
from vertical
Bore and stroke
3.7795 x
2.4464 in
96.000 x
62.138 mm
Displacement 27.436 cu-in 449.77 cm
3
Compression ratio 13.5 : 1
Valve clearance
(cold)
Intake: 0.005 ± 0.001 in
(0.13 ± 0.03 mm)
Exhaust:0.011 ± 0.001 in
(0.28 ± 0.03 mm)
Engine oil capacity
after draining 1.06 US qt 1.00 ℓ
after draining and
oil filter change
1.10 US qt 1.04 ℓ
after
disassembly
1.43 US qt 1.35 ℓ
Throttle body
Identification
number
GQ2JA
Idle speed 2,000 ± 100 rpm
Cooling system
Cooling capacity
after draining 1.13 US qt 1.07 ℓ
after
disassembly
CRF450RX:
1.22 US qt
CRF450R/RWE:
1.19 US qt
CRF450RX:
1.15 ℓ
CRF450R/RWE:
1.13 ℓ

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