Technical data

Section 03 FUEL SYSTEM
Subsection 01 (CARBURETION)
03-01-4
The solenoid is responsible for changing the vent-
ing position of the carburetors. The solenoid is lo-
cated on the body, on left side.
TYPICAL
1. Solenoid
Up to 80% throttle opening, the solenoid is not
activated and the diaphragms of the carburetors
are opened to atmosphere.
SOLENOID NOT ACTIVATED
1. Inlet (carburetor diaphragms)
2. Outlet to atmosphere
3. Outlet to air intake silencer blocked
From 80% to full throttle opening, the throttle po-
sition switch signals the amplifier. The amplifier
boost the signal to activate the solenoid.
The solenoid transfers the venting of the regulator
diaphragms from atmosphere to the air intake si-
lencer (vacuum).
SOLENOID ACTIVATED
1. Inlet (carburetor diaphragms)
2. Outlet to atmosphere blocked
3. Outlet to air intake silencer opened
When the diaphragms are opened to the air intake
silencer, the resulted vacuum moves the dia-
phragms, slightly leaning the mixture of the carbu-
retors.
Inspection
Throttle Position Switch
Disconnect the 3-wire connector housing from
the amplifier.
Using a 12 V battery and jumpers, connect the
POSITIVE to the connector housing RED wire
(POSITION A) and the negative to the connector
housing BLACK wire (POSITION B).
Using a voltmeter, connect the positive probe to
the RED wire (POSITION A) of the connector
housing and the negative probe to the BLUE wire
(POSITION C) of the connector housing.
The voltmeter should indicate 0 Volt.
Depress the throttle lever progressively. At 80%
to full throttle opening, the voltmeter should indi-
cate the battery voltage. If not, replace throttle ca-
ble.
Amplifier
First, ensure the throttle position switch is in good
condition.
Disconnect the wiring harness (PURPLE and
BLACK wires) of the amplifier.
Using a 12 V battery and jumpers, connect the
POSITIVE to the amplifier PURPLE wire and the
NEGATIVE to the amplifier BLACK wire.
F06F0BA
1
F06F0BB
3
1
2
F06F0BB
3
1
2
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