Input Voltage Inspection; Resistance Inspection; Starting Enrichment {Se) Valve - Honda 2003 NPS50 Ruckus Service Manual

When the vehicle is to be operated continuously
below 1 ,500 m (5,000 feet), readjust the carburetor
as follows.
Warm up the engine to operating temperature. Ride
the scooter for approximately 1 0 minutes.
Turn the pilot screw out 1/4 turn from the high alti­
tude setting.
Replace the high altitude main jet with t he standard
ty pe .
STANDARD ALTITUDE MAIN JET: #75
Adjust the idle speed at low altitude with the throttle
stop screw.
Remove the Vehicle Emission Control I nformation
Update Label that is attached on the rear frame after
adjusting for low altitude.
STARTING ENRICHMENT (SE) VALVE

INPUT VOLTAGE INSPECTION

Remove the plug maintenance lid (page 4-6).
Connect a tachometer according to its manufac­
turer's instruction.
The SE valve Disconnect the SE valve 2P connector.
inspectfons can be
With the engine started at cold (Water is below
dane with the
35"C/95"F), measure the voltage between the Black
carburetor in the
(+ ) and Blue/Black (-) wire terminals of the SE valve
engine.
2P connector.
It is normal if there is no battery voltage.
Connect the 2P connector and warm up the engine
by keeping the engine speed approx. 6,000 rpm for
5-6 minutes (at 25"Cn7"F).
•
Measure the voltage between the Black and Blue/
Black wire terminals again with the engine running.
It is normal if there is battery voltage.
•
If input voltage is abnormal, check the open o r
short circuit o f Black and Blue/Black wires and
ECT sensor (page 19-15).
If those are normal, do the following inspection.

RESISTANCE INSPECTION

Measure the resistance between the connector ter­
minals.
STANDARD: 2.8 - 5.2
If the resistance is abnormal, replace the SE valve.
Disconnect the tachometer and install the plug
maintenance lid (page 4-6).
Q
(at 20"C/68"F)
FUEL SYSTEM
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