Honda NRX1800 2004 Owner's Manual page 202

Capacities
passenger capacity
maximum weight
capacity
Engine Specifications
displacement
bore & stroke
compression ratio
spark plug (standard)
spark plug (high
speed riding)
valve clearance
(cold)
spark plug gap
idle speed
Operator only. no passenger
276 lbs (125 kg)
rider and all accessories
111.8 cu-in (1,832 cm )
2.91 × 2.80 in (74.0
9.8 : 1
BKR5E 11 (NGK) −
BKR6E 11 (NGK) −
intake: 0.006 in (0.15 mm)
exhaust: 0.009 in (0.22 mm)
0.039 0.043 in (1.0 1.1 mm) −
850 ± 100 rpm
950 ± 100 rpm California only
× 71.0 mm)
or K16PR U11 (DENSO) −
or K20PR U11 (DENSO) −
−
Technical Information
Specifications
193