Specifications - Honda CRF450RX 2020 Owner's Manual & Competition Handbook

Specifications

Item English
Dimension
CRF450RX:
85.6 in
Overall length
CRF450R/RWE:
85.9 in
Overall width 32.6 in
Overall height 49.6 in
CRF450RX:
58.1 in
Wheelbase
CRF450R/RWE:
58.3 in
Seat height 37.8 in
CRF450RX:
16.4 in
Footpeg height
CRF450R/RWE:
16.5 in
Ground clearance 12.9 in
Frame
Type Twin tube
Telescopic fork,
F. suspension travel 10.55 in (268 mm)
stroke 12.01 in (305 mm)
Pro-link,
CRF450RX:
R. suspension travel 12.28 in (312 mm)
CRF450R/RWE:
travel 12.36 in (314 mm)
CRF450RX: 90/90-21 54M
CRF450R/RWE: 80/100-21 51M
Tire size, front
DUNLOP
CRF450RX: 120/90-18 65M
CRF450R/RWE: 120/80-19 63M
Tire size, rear
DUNLOP
Tire type bias-ply, tube
Tire pressure, front
Metric
(cold)
Tire pressure, rear
CRF450RX:
(cold)
2,175 mm
CRF450R/RWE:
F. brake, swept area
2,183 mm
827 mm R. brake, swept
area
CRF450RX:
1,259 mm
Fuel
CRF450R/RWE:
1,260 mm
CRF450RX:
Fuel tank capacity
1,477 mm
CRF450R/RWE:
1,482 mm
Caster angle
CRF450RX:
959 mm
Trail length
CRF450R/RWE:
960 mm
Fork oil capacity
CRF450RX:
(except damper)
417 mm
CRF450R/RWE:
418 mm Fork oil capacity
(damper)
328 mm
CRF450RX:
AT81F
CRF450R/RWE:
MX3SF
CRF450RX:
AT81
CRF450R/RWE:
MX3S
15 psi (100 kPa, 1.0 kgf/cm 2 )
15 psi (100 kPa, 1.0 kgf/cm 2 )
Single disc brake
56.0 in 2 (361.0 cm 2 )
Single disc brake
60.5 in 2 (390.3 cm 2 )
unleaded gasoline, pump octane
number of 91 or higher
CRF450RX: CRF450RX:
2.25 US gal 8.5 ℓ
CRF450R/RWE: CRF450R/RWE:
1.66 US gal 6.3 ℓ
CRF450RX: 27°26'
CRF450R/RWE: 27°22'
4.6 in 116 mm
CRF450RX: CRF450RX:
12.3 US oz 363 cm 3
CRF450R/RWE: CRF450R/RWE:
12.0 US oz 356 cm 3
8.2 US oz 243 cm 3

Specifications

Item English
Engine
Type Liquid cooled, 4-stroke
Cylinder Single 10° inclined
arrangement from vertical
3.7795 x
Bore and stroke
2.4464 in
Displacement 27.436 cu-in
Compression ratio 13.5 : 1
Intake: 0.005 ± 0.001 in
Valve clearance (0.13 ± 0.03 mm)
(cold) Exhaust:0.011 ± 0.001 in
(0.28 ± 0.03 mm)
Engine oil capacity
after draining 1.06 US qt
after draining and
1.10 US qt
oil filter change
after
1.43 US qt
disassembly
Throttle body
Identification
GQ2JA
number
Idle speed 2,000 ± 100 rpm
Cooling system
Cooling capacity
after draining 1.13 US qt
CRF450RX:
after 1.22 US qt
disassembly CRF450R/RWE:
1.19 US qt
Technical Information
Metric
96.000 x
62.138 mm
3
449.77 cm
1.00 ℓ
1.04 ℓ
1.35 ℓ
1.07 ℓ
CRF450RX:
1.15 ℓ
CRF450R/RWE:
1.13 ℓ
(cont'd)
173