Fuel - Honda TRX500FM6 Owner's Manual

Fluids & Filters Service Procedures

Fuel

Refer to Safety Precautions on page 115.
Fuel Recommendation
type
research octane number
Use only unleaded fuel in your Honda. If you ride your Honda in a
country where leaded fuel might be available, take precautions to
use only unleaded fuel.
Your engine is designed to use any unleaded petrol that has a pump
octane number (R + M)/2 of 86 or higher, or a research octane
number of 91 or higher. Petrol pumps at service stations normally
display the pump octane number. For information on the use of
Petrol Containing Alcohol, see page 238.
Use of lower octane petrol can cause persistent "pinging" or "spark
knock" (a loud rapping noise) which, if severe, can lead to engine
damage. Light pinging experienced while operating under a heavy
load, such as climbing a hill, is no cause for concern.
If pinging or spark knock occurs at a steady engine speed under
normal load, change brands of petrol. If pinging or spark knock
persists, consult your dealer.
Never use stale or contaminated petrol or an oil/petrol mixture.
Avoid getting dirt, dust, or water in the fuel tank.
130 Servicing Your Honda
unleaded
91 (or higher)