Honda CRF450RX 2020 Owner's Manual & Competition Handbook page 179

Specifications
Item English
Drive train
Clutch type Wet, multi-plate type
Transmission 5-speed, constant mesh
Primary reduction
Gear ratio I
Gear ratio II
Gear ratio III
Gear ratio IV
Gear ratio V
CRF450RX: 3.846
Final reduction
CRF450R/RWE: 3.769
Left foot-operated return
Gear shift pattern
system 1-N-2-3-4-5
Electrical
HY85S lithium-ion (li-ion)
Battery
12 V-2.0 Ah (20 HR)
Ignition
Starting system
Spark plug NGK
Standard SILMAR9A-9S
NGK
For extended high
speed riding
SILMAR10A-9S
0.031 – 0.035 in
Spark plug gap
(0.8 – 0.9 mm)
Fuse
Main fuse
174
Technical Information
Metric
2.357
2.133
1.706
1.421
1.211
1.043
ECM
Electric
10 A