Honda VTX1800R Owner's Manual page 229

Quick Reference
Tires
Tire Pressure
(cold)
Spark Plugs
Fuses
Final Drive Oil
Quick Reference
Front: 150/80R17M/C 72H
DUNLOP D251F
150/80-17M/C 72H
DUNLOP D404F
180/70R16M/C 77H
Rear:
DUNLOP D251
170/80-15M/C 77H
DUNLOP K555J
radial, tubeless
Type:
bias-ply, tube
Front: 33 psi (225 kPa , 2.25 kgf/cm )
Rear: 33 psi (225 kPa , 2.25 kgf/cm )
with less than 200 lbs (90 kg) of added weight
36 psi (250 kPa , 2.50 kgf/cm )
with more than 200 lbs (90 kg) of added weight
standard: IFR5L11 (NGK)
high speed riding: IFR6L11 (NGK)
30A
main A: main B:
Hypoid Gear Oil SAE 80
...VTX1800R/N
...VTX1800S
...VTX1800R/N
...VTX1800S
...VTX1800R/N
...VTX1800S
or VK16PRZ11 (DENSO)
or VK20PRZ11 (DENSO)
30A 20A, 10A, 5A
other: