Polaris TX Starfire - Page 77

CARBURETORS (Can't.)
When the
fuel-air mixture is too lean:
( 1) The engine is over-heated.
(2)
When the choke is opened, the condition becomes better.
(3)
Acceleration is poor.
(4) The ignition plug is burnt.
(5) Rotations
are irregular.
( 6) Exhaust gas is lean.
Our
carburetor is so constructed that the parts to adjust vary
according
to the degree of throttle opening. After having
checked whether the
cause of disorder is due to an over-rich
mixture or to over-lean mixture, confirm what parts must be
adjusted for a specific throttle opening.
The
relation between the degree of the opening of the throttle
valve and the functional systems and the parts to adjust is as
follows:
Throttle Valve
Degree of Opening
0 - 1/8 1/8 - 1/4 1/4 - 3/4
3/4 -
Full Open
Functional System Pilot System Pilot System Main System
Main System
Main System
Parts to Adjust
Air Screw
Throttle Valve
Jet Needle
Main Jet
Air Screw
When the condition of disorder and the degree of opening have
been confirmed, first check and clean the functional systems
and then adjust the parts in question.
DEGREE
OF OPENING: 0- 1/8, air screw
When the opening
is closed, the amount of air reduces and the
fuel-air mixture becomes rich.
When the opening is opened, the amount of air increases and
the
fuel-air mixture becomes lean.
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