4-15
E
FUEL
THROTTLE BODY ASSEMBLY AND INTAKE
MANIFOLD
Fuel injectors inspection
NOTE:
Do not remove the throttle body assembly.
1. Check:
• Fuel injectors
Dirt/residue
→
Clean.
Damage
→
Replace.
2. Measure:
• Fuel injectors resistance
Out of specification
→
Replace.
3. Check the operation of the fuel injector
using the “Stationary Test” of the Yamaha
Diagnostic System.
Digital multimeter:
YU-34899-A
Digital circuit tester:
90890-03174
Fuel injector resistance:
(reference data)
11.5–12.5
Ω
at 20 °C (68 °F)
Throttle body assembly inspection
CAUTION:
The throttle body assembly should not be
disassembled.
1. Check:
• Throttle body assembly
Cracks/damage
→
Replace the throttle
body assembly.
Accelerator position sensor inspection
1. Inspect:
• Accelerator position sensor
Damage/cracks
→
Replace the acceler-
ator position sensor.