Instrument an
d
control functions
4-28
4
[(R+M)/2] of 86 or higher, or a research
octane number of 91 or higher. If
knocking (or pinging) occurs, use a
gasoline of a different brand or premi-
um unleaded fuel. 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.
EAU48792
Fuel tank
b
reather/overflow
hose
TIP
For California: See page 7-11 for
breather hose information.
Before operating the motorcycle:
Check the fuel tank breather/over-
flow hose connection.
Check the fuel tank breather/over-
flow hose for cracks or damage,
and replace it if necessary.
Make sure that the end of the fuel
tank breather/overflow hose is not
blocked, and clean it if necessary.
Make sure that the fuel tank
breather/overflow hose is routed
through the clamp.
1. Fuel tank breather/overflow hose
2. Clamp
2
1
UB9614E0.book Page 28 Friday, November 15, 2019 1:30 PM
