Honda Goldwing F6B Owner's Manual page 55

12/12/06 16:17:30 32MJG600_055
Use unleaded petrol with a research octane number of 91 or higher.
The use of leaded petrol will cause premature damage to the catalytic
converter.
Occasionally you may experience light spark knock while operating under
heavy loads. This is no cause for concern, it simply means your engine is
operating efficiently.
If ''spark knock'' or ''pinking'' occurs at a steady engine speed under normal
load, change brands of petrol. If spark knock or pinking persists, consult your
dealer. Failure to do so is considered misuse, and damage caused by misuse is
not covered by Honda's Limited Warranty.
45