Arctic Cat 650 Twin2004 Service Manual page 90

9. Inspect tips of the jet needle, pilot screw, and the
needle valve for wear, damage, or distortion.
10. Inspect the slow jet and main jet for obstructions
or damage.

NOTE: If the slow jet is obstructed, the mixture
will be extremely lean at idle and part-throttle oper-
ation.
11. Inspect the starter valve and seat for wear or
damage.
ASSEMBLING
! CAUTION
Do not force or overtighten carburetor jets and
fittings. Damage to the jets or carburetor could
occur.
1. Install the needle valve into the valve seat and
engage and hook the needle hanger (A) onto the
float tab; then insert the float pivot pin (B) into the
pivot post and tighten the set screw (C).
2. Install the main jet and slow jet.
3. Insert the jet needle (A) into the vacuum piston
(B); then install the spring seat (C) over the
needle.
4. Turn the spring seat (A) so it does not block the
vent hole (B).
5. Install the piston into the carburetor body and
engage the tab (A) of the diaphragm into the recess
(B); then install the spring and vacuum chamber
cover. Secure with four screws.
6. Install the pump diaphragm and O-ring; then
install the pump cover and secure with two screws.

NOTE: Check float arm height by placing the car-
buretor on its side w/float contacting the needle;
KX374
then measure with a caliper the height when the
float arm is in contact with the needle valve. Float
arm height should be 3-5 mm (0.12-0.20 in.).
7. Place the float chamber into position making sure
the O-ring is properly positioned; then secure with
Phillips-head screws.
ATV2110
ATV2111
4
KX375
CC750
4-7