Checking The Fuel Injector; Checking The Throttle Body - Yamaha XT660R S Service Manual

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THROTTLE BODY ASSEMBLY
R/L R/B
http://manuals.magnamaniac.com
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EAS00912

CHECKING THE FUEL INJECTOR

1. Check:
• fuel injector
Damage → Replace.
2. Check:
• fuel injector resistance
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a. Disconnect the injection wire harness cou-
pler from the fuel injector.
b. Connect the pocket tester (Ω × 1) to the fuel
injector terminal as shown.
Positive tester probe → red/black 1
Negative tester probe → red/blue 2
c. Measure the fuel injector resistance.
Out of specification → Replace the fuel
injector.
Fuel injector resistance
12 Ω at 20 °C (68 °F)
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EAS00913

CHECKING THE THROTTLE BODY

1. Check:
• throttle body
Cracks/damage → Replace the throttle
body.
2. Check:
• fuel passages
Obstructions → Clean.
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a. Wash the throttle body in a petroleum-
based solvent
CAUTION:
Do not use any caustic carburetor cleaning
solution.
b. Blow out all of the passages with com-
pressed air.
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FI
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L LLL L L LLL L L LLL L
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LLL
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LLL