Publicité
ı
4/4
3/4
1/2
1/4
1/8
0
Å
Å Closed
ı Fully open
All manuals and user guides at all-guides.com
Atmospheric conditions and carburetor
settings
That is:
Effects of the setting parts on the throttle
valve opening
A
1 Pilot screw/pilot jet
2 Piston valve cutaway
3 Jet needle
4 Main jet
7 - 2
SETTING
After installing the carburetor, check that
the throttle operates correctly and opens
and closes smoothly.
Air
Air temp.
Humidity
pressure
(altitude)
High
High
Low (high)
Low
Low
High (low)
The air density (i.e., concentration of oxygen
in the air) determines the richness or lean-
ness of the air/fuel mixture. Therefore, refer
to the above table for mixture settings.
Higher temperature expands the air with its
resultant reduced density.
Higher humidity reduces the amount of oxy-
gen in the air by so much of the water vapor
in the same air.
Lower atmospheric pressure (at a high alti-
tude) reduces the density of the air.
1
2
3
1/8
1/4
1/2
T U N
Mixture
Setting
Richer
Leaner
Leaner
Richer
4
3/4
B
Publicité
