Inspection - Yamaha RS90K Service Manual

1
CARBURETORS AND FUEL PUMP
2. Adjust:
Adjustment steps:
• Disconnect the throttle position sensor coupler.
• Connect the test coupler to the throttle position
• Connect three dry cells (1.5 V × 3 pcs.) in series
Dry cells negative end → 1
Dry cells positive end → 2
• Connect the digital multi meter to the test cou-
Digital multi meter negative lead → 1
Digital multi meter positive lead → 3
• Measure the voltage A.
NOTE:
When measuring the voltage A be sure that the
test coupler is connected to the throttle position
sensor.
• Calculate the specified voltage B.
Specified voltage B = Voltage A × (0.136)
• Loosen the throttle position sensor bolt 4.
4
• Connect the digital multi meter to the test cou-
Digital multi meter negative lead → 1
Digital multi meter positive lead → 3
• Adjust the throttle position sensor position to
• Tighten the throttle position sensor bolt 4.
• Disconnect the test coupler and connect the

INSPECTION

1. Inspect:
2
7-12
• Throttle position sensor angle
sensor.
to the test coupler.
pler.
pler.
obtain the specified voltage B.
throttle position sensor coupler.
• Fuel hoses 1
• Vacuum hoses 2
Clogs/damage → Replace.
CARB