Fuel Tank Breather Hose And Overflow Hose - Yamaha YZF R1 2021 Owner's Manual

ohol containing methanol is not
recommended by Yamaha because it
can cause damage to the fuel system
or vehicle performance problems.
NOTICE
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.
Fuel tank breather hose and
overflow hose
For U49 models
ECA11401
3
1
1. Fuel tank overflow hose
2. Fuel tank breather hose
3. White mark
For California
2
1
1. Fuel tank overflow hose
2. White mark
5-35
Instrument and control functions
The breather hose prevents a vacuum
EAU86260
condition from forming within the fuel
tank.
The overflow hose drains excess gaso-
line and directs it safely away from the
vehicle.
Before operating the vehicle:
 check each hose connection.
2  check each hose for damage.
 confirm the end of each hose is
not blocked.
 confirm each hose is positioned
as shown.
TIP
For California: See page 8-14 for can-
ister information.
5