Polaris 1999 Sportsman 400 Service Manual page 187

FUEL SYSTEM
18 1
2. If remove d, install the j et block assembly (D,
Figure 26) and make sure
it
is seated correctly.
Tighten the screws and washers securely.
3. Install the need le j et as follows:
a. Correctly align the needle jet flat (A, Figure
28) with the flat (B, Figu re 28) in the carbure-
tor body.
b.
Inse rt
the needle je t (Fi gure 25) into the top
of the carburetorand into the
post. Push
it
in
until
it
bottoms.
c. After installation, check that the needle jet
flat is aligned with the Oat in the carburetor
body (Figure 29).
4. Install the air j et (Figure 23) and tighten se-
curely.
5. Install the main jet spacer ring (Figure 22 ).
6. Make sure the needle jet is pushed all the way
into the body, then install the main jet. Tighten the
main jet securely (Figure 21).
7. Install the pilot j et (F igure 30) and tighten se-
curely.
8. Make sure the O-ring is in place, then install the
needle valve seat (Figure 19). Push
it
down
until
it
bottom s.
III