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9-2-3 PILOT SYSTEM
1)
Remove pilot jet
(5)
using a suitable tool while taking care not to damage it.
2) Detach pilot screw
(6)
and spring (7).
In reassembly;
1)
Clamp pilot jet securely, otherwise fuel leaks, causing engine failures.
2)
If
the tapered portion of pilot screw
is
deformed, replace it with new one. Avoid clamping it
too
tightly.
9-2-4 MAIN SYSTEM
1)
Detach main jet holder (23), and remove float chamber body
(20).
2) Detach main jet (22)
from
main jet holder
(23).
3) Remove main nozzle (2) from carburetor main body.
In reassembly;
1) Clamp main jet to main jet holder securely, otherwise the fuel mixutre
is
too
rich, and an engine disorder may result.
2)
Tighten main jet holder to a clamping torque of 70-80 kg-cm (5.1-5.8 ft-lbs.).
9-2-5 FLOAT SYSTEM
After pulling out float pin (1 8), detach float
(1
7) and needle valve (4).
In reassembly;
When replacing needle valve, replace it together with valve seat without fail.
CAUTION: AVOID USING A DRILL
OR
A WIRE WHEN CLEANING
JETS,
OTHERWISE THE ORIFICE MAY
BE
DAMAGED. CAUSING UNFAVORABLE EFFECTS TO FUEL FLOW.
US€
COMPRESSED AIR WITHOUT FAIL.
9-3
ADJUSTMENT
1)
Adjust pilot screw by turning it counter-clockwise
by
1-1/2 turn (EY33-2)
or
1-3/4 turn (EY44-2) after fully closing it
once. Avoid clamping pilot screw excessively, otherwise needle point may broken.
2) Turn throttle top screw clockwise until the specified idling speed
of
1,200rpm is obtained. If this speed exceeds
1,20Orpm, turn throttle top screw counter-clockwise.
3) Make final adjustments with air cleaner mounted and also engine at normal operating temperature.
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