Fuel Tank Breather Hose; Fuel Cock - Yamaha TT-R Owner's Manual

Your Yamaha engine has been
designed to use regular unleaded
gasoline with a pump octane number
[(R+M)/2] of 86 or higher, or a
research octane number of 91 or
higher. If knocking (or
occurs, use a gasoline of a different
brand or premium unleaded fuel. Use
of unleaded fuel will extend spark
plug life and reduce maintenance
costs.
Gasohol
There are two types of gasohol:
gasohol containing ethanol and that
containing methanol. Gasohol con-
taining ethanol can be used if the
ethanol content does not exceed
10%. Gasohol containing methanol is
not recommended by
because it can cause damage to the
fuel system or vehicle performance
problems.
INSTRUMENT AND CONTROL FUNCTIONS
1
pinging)

1. Fuel tank breather hose

Fuel tank breather hose
Before operating the machine:
8 Check the fuel tank breather
hose connection.
8 Check the fuel tank breather
hose for cracks or damage, and
replace it if damaged.
8 Make sure that the end of the
fuel tank breather hose is not
Yamaha
blocked, and clean it if neces-
sary.
OFF: closed position
OFF
1. Arrow mark positioned over "OFF"
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Fuel cock

The fuel cock supplies fuel from the
tank to the carburetor while filtering it
also.
The fuel cock has three positions:
OFF
With the lever in this position, fuel will
not flow. Always return the lever to
this position when the engine is not
running.
3-5
RES
FUEL
ON
1
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3