Yamaha YZFR1Y(C) 2009 Service Manual page 372

EAS14B4007
CHECKING THE PRIMARY INJECTORS
(BEFORE REMOVING)
1. Check:
• Injectors
Use the diagnostic code number "D:36–
D:39".
Refer to "DIAGNOSTIC MODE" on page
8-38.
EAS14B4008
REMOVING THE PRIMARY INJECTORS
EWA14B4002
WARNING
• Check the injectors in a well-ventilated
area free of combustible materials. Make
sure that there is no smoking or use of
electric tools in the vicinity of the injec-
tors.
• Be careful when disconnecting the fuel
hoses. Any remaining pressure in the fuel
hoses may cause the fuel to spray out.
Place a container or rag under the hoses
to catch any fuel that spills. Always clean
up any spilt fuel immediately.
• Turn the main switch to "OFF" and dis-
connect the negative battery lead from
the battery terminal before checking the
injectors.
1. Remove:
• Fuel tank
• Fuel connector
• Air filter case
• Throttle bodies
2. Remove:
• Sub-wire harness
• Primary injectors
▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼
a. Remove the fuel rail screws "1" as shown.
▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲
3. Remove:
• Fuel rails "1"
• Primary injector joint "2"
THROTTLE BODIES
EAS14B4009
CHECKING THE PRIMARY INJECTORS
1. Check:
• Injectors
Obstruction → Replace and check the
fuel pump/fuel supply system.
Deposit → Replace.
Damage → Replace.
2. Check:
• Injector resistance
Refer to "CHECKING THE FUEL INJEC-
TORS" on page 8-128.
EAS14B4001
CHECKING THE ROLLOVER VALVE (for
California only)
1. Check:
• Rollover valve "1"
Damage/faulty → Replace.
TIP
• Check that air flows smoothly only in the
direction of the arrow shown in the illustra-
tion.
• The rollover valve must be in an upright posi-
tion when checking the airflow.
EAS14B1072
CHECKING AND CLEANING THE THROT-
TLE BODIES
TIP
Clean the throttle bodies only if they cannot be
synchronized using the bypass air screws.
7-15