Fuel; Fuel Grade; Oxygenated Gasoline; Ethanol - Triumph Bonneville Handbook

General Information

Fuel

Fuel Grade

cbny
This Triumph motorcycle is designed to run
on unleaded gasoline with a CLC or AKI
octane rating (R+M)/2 of 87 or higher.
Federal regulations require that pumps
delivering unleaded gasoline are marked
'UNLEADED' and that the Cost of Living
Council (CLC) or Anti-Knock Index (AKI)
octane rating is also displayed. These ratings
are an average of the Research Octane
Number (RON) and the Motor Octane
Number (MON).
Caution
The exhaust system is fitted with a catalytic
converter to help reduce exhaust emission
levels. The catalytic converter can be
permanently damaged if the motorcycle is
allowed to run out of fuel or if the fuel level
is allowed to get very low. Always ensure
you have adequate fuel for your journey.
Caution
The use of leaded gasoline is illegal in
some countries, states or territories. Use of
leaded fuel will damage the catalytic
converter.
NOTE
• If 'knocking' or 'pinging' occurs at a
steady engine speed under normal
load, use a different brand of
gasoline or gasoline which has a
higher octane rating.
34

Oxygenated Gasoline

P b To help in meeting clean air standards, some
areas of the U.S. use oxygenated gasoline to
help reduce harmful
gasolines are a blend of conventional
gasoline and another compound such as
alcohol. This Triumph motorcycle will give its
best performance when using unleaded
gasoline. However, the following should be
used as a guide if you use any oxygenated
fuels.

Ethanol

Ethanol fuel is a mixture of 10% Ethanol and
90% gasoline and is often described under
the names 'gasohol', 'Ethanol enhanced', or
'contains Ethanol'. This fuel may be used in
your Triumph motorcycle.
MTBE (Methyl
Ether)
The use of gasolines containing up to 15%
MTBE (Methyl Tertiary Butyl Ether) is
permitted in this Triumph motorcycle.

Methanol

Caution
Fuels containing methanol should not be
used as damage to components in the fuel
system can be caused by contact with
methanol.
emissions. These
Tertiary Butyl