Honda CB250 Nighthawk Owner's Manual page 179

Specifications
Capacities
passenger capacity
maximum weight
capacity
Engine Specifications
displacement
bore & stroke
compression ratio
spark plug (standard)
spark plug
(cold climate)
spark plug (high
speed riding)
valve clearance
(cold)
spark plug gap
idle speed
170
Technical Information
Operator and one passenger
352 lbs (160 kg)
rider, passenger, all cargo and accessories
14.3 cu-in (234 cm )
2.09 2.09 in (53.0
9.2 : 1
CR6HSA (NGK) or
CR5HSA (NGK) or
CR7HSA (NGK) or
intake: 0.003 in (0.08 mm)
exhaust: 0.003 in (0.08 mm)
0.024 0.028 in (0.60 0.70 mm)
1,500 100 rpm
53.0 mm)
U20FSR U (DENSO)
U16FSR U (DENSO)
U22FSR U (DENSO)