Honda CRF230F Owner's Manual page 109

ENGINE
Bore and stroke
Compression ratio
Displacement
Spark plug
Standard
For cold climate
(Below 5°C, 41°F)
Idle speed
Valve clearance (Cold)
98
65.5 x 66.2 mm (2.58 x 2.61 in)
9.0:1
3
223.0 cm (13,60 cu.in)
DPR8EA – 9 (NGK) or
X24EPR – U9 (DENSO)
DPR7EA – 9 (NGK) or
X22EPR – U9 (DENSO)
-1
1,400 ± 100 min (rpm)
Intake 0.10 mm (0.004 in)
Exhaust 0.10 mm (0.004 in)