12. CARBURETOR VITALITY 50
O-rings
CARBURETOR INSTALLATION
When installation, do not allow foreign
particles to enter the carburetor.
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.
Route the auto bystarter wire correctly
and properly. Insulator
Install the carburetor top. ( 12-5)
Install the air cleaner onto the carburetor
and tighten the band screw.
AIR SCREW ADJUSTMENT
(2-STROKE)
Do not force the air screw against its
seat to prevent damage.
Turn the air screw (1) clockwise until it
seats lightly and back it to the specification
given.
Air Screw Opening: 2 1/2 1/2 turns
Start the engine and turn the air screw in or
out slowly to obtain the highest engine
speed.
Do not force the air screw against its
seat to prevent damage.
Turn the throttle stop screw (2) to obtain
the specified idle speed.
Idle Speed: 1850100rpm
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 1/2 turn makes no difference to
the engine performance, check other related
items.
12-13
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