Carburetor Installation; Air Screw Adjustment - KYMCO ZX/SCOUT 50 Service Manual

11
. CARBURETOR

CARBURETOR INSTALLATION

Check the carburetor insulator and O-ring
for wear or damage.
Install the carburetor and insulator onto the
intake manifold and tighten the two lock
nuts.
Connect the fuel tube and auto bystarter
wire connector.
Install the carburetor cap. ( 11-4)
Install the air cleaner onto the carburetor
and tighten the band screw.
Install the met-in box. ( 12 -4)

AIR SCREW ADJUSTMENT

Remove the met-in box. ( 12 -4)
Turn the air screw clockwise until it seats
lightly and back it to the specification
given.
Air Screw Opening:
1± ¼ turns
Start the engine and turn the air screw in or
out slowly to obtain the highest engine
speed.
Turn the throttle stop screw to obtain the
specified idle speed.
Idle Speed:
2100±100rpm
Slightly increase the engine speed and
make sure that the engine does not miss or
run erratic.
If the adjustment of the air screw within the
range of ±
½ turn makes no difference to the
engine performance, check other related
items.
11-11
ZX / SCOUT
Carburetor Cap
Air Screw
Throttle Stop Screw
Insulator