Instrument and control functions
4-17
4
ately. If gasoline spills on your skin,
wash with soap and water. If gaso-
line spills on your clothing, change
your clothes.
EAU86081
Your Yamaha engine was designed to
use unleaded gasoline with a research
octane number of 90 or higher. If en-
gine knocking or pinging occurs, use a
gasoline of a different brand or higher
octane rating.
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.
NOTICE
ECA11401
Use only unleaded gasoline. The use
of leaded gasoline will cause severe
damage to internal engine parts,
such as the valves and piston rings,
as well as to the exhaust system.
EAU92541
Fuel tank breather hose and
overflow hose
YZF660N
YZF690N
Recommended fuel:
Unleaded gasoline (E10 acceptable)
Octane number (RON):
90
Fuel tank capacity:
13 L (3.4 US gal, 2.9 Imp.gal)
Fuel tank reserve:
2.5 L (0.66 US gal, 0.55 Imp.gal)
1. Fuel tank breather hose
2. Fuel tank overflow hose
3. Clamp
1. Fuel tank overflow hose
2. Clamp
1
1
1
2
3
2
3
1
1
1
2
2
UBEB20E0.book Page 17 Monday, September 6, 2021 11:24 AM
