FUEL AND CARBURETOR
6-5
The CV carburetor has two throttles, the cable operated butterfly (1) and the vacuum operated plugs (2). The butterfly controls
the idle mixture strength from the passage (13) that
can be adjusted by screw (12). Idle mixture composition is determined by
the idle jet (11) and the air jet (16). At idle, the mixture is also leaned out by air flowing in through
the progression hole (14).
When the butterfly opens, the flow reverses in the progression holes (14) and richer mixture flows into the Venturi air stream
When RPM increases, a vacuum is developed in the manifold and this vacuum is transferr
ed through a hole (6) in the slide
onto the vacuum chamber (3). This vacuum lifts the slide (2) against the spring (4) and midrange is then calibrated by the
needle (7) needle jet (8), and air jet (9). To calibrate the main jet could adjust the top end (10).
To Next Page
Loading...
Need help?
General
