Honda 2009 GOLDWING GL1800 Owner's Manual page 295

Spark Plugs
Coolant
Fuses
Final Drive Oil
standard:
BKR6E-11 (NGK)
cold climat (below 5°C, 41°F):
BKR5E-11 (NGK)
high speed riding:
BKR7E-11 (NGK)
ethylene glycol antifreeze (silicate-free) for aluminum
engines in 50/50 solution with Pro Honda HP Coolant or
an equivalent distilled water
main A: 30 A
external amplifier
(models equipped with Premium Audio):
30 A, 20 A, 15 A, 10 A, 5 A
other:
Hypoid Gear Oil SAE 80
Quick Reference
K20PR-U11 (DENSO)
or
K16PR-U11 (DENSO)
or
or K22PR-U11 (DENSO)
main B: 120 A speed limiter: 60 A
40 A
Quick Reference