Honda NRX1800 2004 Owner's Manual page 245

Quick Reference
Tires
Tire Pressure
(cold)
Spark Plugs
Coolant
Fuses
Final Drive Oil
Quick Reference
150/60R18M/C 67V
Front:
DUNLOP D251F
180/55R17M/C 73V
Rear:
DUNLOP D251
Front: 36 psi (250 kPa , 2.50 kgf/cm )
42 psi (290 kPa , 2.90 kgf/cm )
Rear:
standard: BKR5E 11 (NGK) −
BKR6E 11 (NGK)
high speed riding:
ethylene glycol antifreeze (silicate-free) for aluminum engines in 50/50
solution with Pro Honda HP Coolant or an equivalent distilled water
main A: 30A
30A, 20A, 10A, 5A
other:
Hypoid Gear Oil SAE 80
or K16PR U11 (DENSO)
− or
main B: 100A
−
K20PR U11 (DENSO) −