Honda CRF450R 2022 Owner's Manual page 78

Specifications
Engine
■
Bore x stroke 3.7795 x 2.4464 in (96.000 x 62.138 mm)
Displacement 27.436 cu-in (449.77 cm
Compression
13.5 : 1
ratio
Intake
Valve clearance
(cold)
Exhaust
API Service Classification SG or higher except
oils labeled as energy conserving or resource
conserving on the circular API service label,
Recommended
SAE 10W-30, JASO T 903 standard MA, Pro
engine oil
Honda GN4 4-stroke oil (USA & Canada) or
Honda 4-stroke oil, or an equivalent
motorcycle oil
After draining 1.06 US qt (1.00 L)
After draining
Engine oil and oil filter
capacity change
After
disassembly
Idle speed 2,000 ± 100 rpm
72
)
3
0.005 ± 0.001 in (0.13 ± 0.03
mm)
0.011 ± 0.001 in (0.28 ± 0.03
mm)
1.10 US qt (1.04 L)
1.43 US qt (1.35 L)
Cooling system
■
Recommended
Pro Honda HP Coolant
coolant
After
draining
Cooling capacity
After
disassembly
Drive train
■
Primary reduction 2.357
1st
2nd
Gear ratio 3rd
4th
5th
CRF450RX
Final reduction
CRF450R/RWE 3.769
Left foot-operated return system
Gear shift pattern
1-N-2-3-4-5
1.14 US qt (1.08 L)
1.20 US qt (1.14 L)
2.133
1.706
1.421
1.211
1.043
3.846