Checking The Primary Injectors; Checking The Throttle Bodies; Checking The Fuel Pressure; Adjusting The Throttle Position Sensor (For Throttle Valves) - Yamaha YZF-R6(V) 2006 Service Manual

EAS26980

CHECKING THE PRIMARY INJECTORS

1. Check:
• Injectors
Damage → Replace.
EAS26990

CHECKING THE THROTTLE BODIES

1. Check:
• Throttle bodies
Cracks/damage → Replace the throttle bod-
ies as a set.
2. Check:
• Fuel passages
Obstructions → Clean.
M MMM M MMM M M MMM M
a. Wash the throttle bodies in a petroleum-
based solvent.
Do not use any caustic carburetor cleaning
solution.
b. Blow out all of the passages with compressed
air.
L LLL L LLL L L LLL L
EAS27010

CHECKING THE FUEL PRESSURE

1. Check:
• Fuel pressure
M MMM M MMM M M MMM M
a. Remove the rider seat.
Refer to "GENERAL CHASSIS" on page 4-1.
b. Disconnect the fuel hose (fuel tank to primary
injector fuel rail) "1" from the primary injector
fuel rail.
EW2C01008
WARNING
Cover fuel hose connections with a cloth
when disconnecting them. Residual pres-
sure in the fuel lines could cause fuel to
spurt out when removing the hoses.
1
c. Connect the pressure gauge "2" and adapter
"3" to the fuel hose (fuel tank to primary injec-
tor fuel rail).
M MMM M M MMM M M MMM M
L LLL L L LLL L L LLL L
M MMM M M MMM M M MMM M
1
MMM
d. Start the engine.
e. Measure the fuel pressure.
LLL
Faulty → Replace the fuel pump.
L LLL L LLL L
MMM
ET2C01007
ADJUSTING THE THROTTLE POSITION
SENSOR (FOR THROTTLE VALVES)
1. Check:
• Throttle position sensor (for throttle valves)
Refer to "CHECKING THE THROTTLE PO-
SITION SENSOR (FOR THROTTLE
VALVES)" on page 8-107.
2. Adjust:
• Throttle position sensor angle
M MMM M MMM M
a. Connect the two C size batteries to the throt-
tle servo motor terminal as shown.
• Positive battery lead
light green/red terminal "1"
• Negative battery lead
yellow/red terminal "2"
EC2C01027
CAUTION:
Do not use a 12 V battery to operate the throt-
tle valves.
7-10
THROTTLE BODIES
Pressure gauge
90890-03153
Pressure gauge
YU-03153
Fuel pressure adapter
90890-03176
YM-03176
3
Fuel pressure
324 kPa (46.1 psi) (3.24 kg/cm²)
L LLL L L LLL L L LLL L
M MMM M M MMM M M MMM M
2
L LLL L LLL
M MMM M MMM