Checking The Fuel Injectors - Yamaha 2009 YZF-R1 (Y) Service Manual

EAS14B1101

CHECKING THE FUEL INJECTORS

1. Remove:
• Fuel tank
Refer to "FUEL TANK" on page 7-1.
• Air filter upper cover (for secondary injec-
tor)
Refer to "AIR FILTER CASE" on page 7-
5.
2. Check:
• Fuel injector resistance
Out of specification → Replace the fuel
injector.
Fuel injector resistance
(Primary
injector)
12.0 Ω at 20 °C (68 °F)
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a. Disconnect the fuel injector lead coupler
from wire harness.
b. Connect the pocket tester (Ω × 1) to the
fuel injector coupler.
Pocket tester
90890-03112
Analog pocket tester
YU-03112-C
• Positive tester probe
Injector terminal "1"
• Negative tester probe
Injector terminal "2"
c. Measure the fuel injector resistance.
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injector/Secondary
ELECTRICAL COMPONENTS
8-144