Honda TRX450R Service Manual page 477

IGNITION SYSTEM (After '05)
REPLACEMENT
Remove the carburetor from the engine (page 8-7).
Remove the screw, throttle position sensor and 0-
ring.
Install a new O-ring and the throttle position sensor
by aligning the tabs of the throttle position sensor
with the flat side of the shaft as shown.
Apply locking agent to the screw threads and
loosely install the screw.
Measure the resistance between the Pink and
Green/yellow wire terminal of the sensor side con-
nector.
STANDARD: 4 - 6 kQ. at 20°C (68°F)
Calculated the throttle position sensor resistance at
idle speed using the equation below.
Ax(0.13-0.15) = B
A: Pink and Green/yellow wire terminals resistance.
B:Throttle position sensor (Light green - Green/yel-
low) resistance at idle speed.
(Ex.)
If the Pink and Green/yellow wire terminal resis-
tance is 5kQ, then throttle position sensor (Light
green - Green/yellow) resistance at idle speed is :
5ki2 x (0.13 - 0.15) = 650 - 750 Q.
I THROTTLE POSITION SENSOR
Align
THROTTLE POSITION SENSOR
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