Instrument an
d
control functions
5-19
5
[(R+M)/2] of 91 or higher, or a research
octane number of 95 or higher. If
knocking (or pinging) occurs, use a
gasoline of a different brand. Use of
unleaded fuel will extend spark plug life
and reduce maintenance costs.
Gasohol
There are two types of gasohol: gaso-
hol containing ethanol and that con-
taining methanol. Gasohol containing
ethanol can be used if the ethanol con-
tent does not exceed 10% (E10). Gas-
ohol containing methanol is not
recommended by Yamaha because it
can cause damage to the fuel system
or vehicle performance problems.
EAU58152
Fuel tank
b
reather hose an
d
fuel tank overflow hose
Before operating the vehicle:
Check each hose connection.
Check each hose for cracks or
damage, and replace if necessary.
Make sure that the end of each
hose is not blocked, and clean if
necessary.
Make sure that the end of each
hose is positioned as shown.
TIP
For CA models: See page 8-12 for can-
ister information.
1. Guide
2. Fuel tank overflow hose
3. Fuel tank breather hose (U49 models)
1
3
2
UBN611E0.book Page 19 Wednesday, August 30, 2017 2:47 PM
