Honda CRF250RX Owner's Manual page 74

20210720082638_32K958110_eng_BOOK Page 74 Tuesday, July 20 2021 08:28:26 JST
Engine
■
Bore x stroke 79.000 x 50.887 mm (3.1102 x 2.0034 in)
Displacement 249.43 cm
Compression
13.9 : 1
ratio
Intake
Valve clearance
(cold)
Exhaust
Honda 4-stroke motorcycle oil API Service
Classification SJ or higher, excluding oils
Recommended
marked as "Energy Conserving" or "Resource
engine oil
Conserving," SAE 10W-30, JASO T 903
standard MA
After draining
After draining
Engine oil
and oil filter
capacity
change
After
disassembly
Idle speed 2,000 ± 100 rpm
(15.215 cu-in)
3
0.10 ± 0.03 mm (0.004
± 0.001 in)
0.20 ± 0.03 mm (0.008
± 0.001 in)
1.05 L (1.11 US qt, 0.92
Imp qt)
1.08 L (1.14 US qt, 0.95
Imp qt)
1.35 L (1.43 US qt, 1.19
Imp qt)
Cooling system
■
Recommended
Pro Honda HP Coolant
coolant
After draining
Cooling capacity
After
disassembly
Drive train
■
Primary reduction 3.047
1st
2nd
Gear ratio 3rd
4th
5th
Final reduction 3.846
Left foot-operated return system
Gear shift pattern
1-N-2-3-4-5
Specifications
1.04 L (1.10 US qt, 0.92
Imp qt)
1.15 L (1.22 US qt, 1.01
Imp qt)
2.384
1.933
1.600
1.350
1.153
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