Air Screw Adjustment; Reed Valve - KYMCO ZX Service Manual

11
. CARBURETOR
manifold and tighten the two lock nuts.
Connect the fuel tube and auto bystarter wire
connector.
Install the carburetor cap. ( ð 11-4)
Install the air cleaner onto the carburetor and
tighten the band screw.
Install the met-in box. ( ð12 -4)

AIR SCREW ADJUSTMENT

Remove the met-in box. ( ð12 -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
Carburetor Cap
Air Screw
Throttle Stop Screw

REED VALVE

REMOVAL
Remove the rear carrier.
Remove the frame body cover.
Remove the four intake manifold bolts and gasket.
Remove the reed valve and gasket.
ZX / SCOUT
Insulator