4-2
Fuel/Lubrication/
Cooling
NOTE: Arctic Cat recommends the use of new
gaskets, lock nuts, and seals and lubricating all
internal components when servicing the
engine/transmission.
NOTE: Some photographs and illustrations used
in this section are used for clarity purposes only
and are not designed to depict actual conditions.
NOTE: Critical torque specifications are located
in Section 1.
SPECIAL TOOLS
A number of special tools must be available to the
technician when performing service procedures in this
section. Refer to the current Special Tools Catalog for
the appropriate tool description.
NOTE: Special tools are available from the Arctic
Cat Service Parts Department.
Carburetor
Specifications
(400/650)
Carburetor Schematics
(400/650)
0740-600
Carburetor
(400/650)
REMOVING
1. Remove the seat.
2. As necessary to access the carburetor, remove the
air-intake snorkel, the air filter housing cover, or
the air filter housing.
3. Disconnect the gasline hose from the carburetor to
the fuel pump.
4. Loosen the flange clamps; then remove the carbu-
retor from the intake pipe.
5. Remove the screw securing the throttle actuator
cover to the carburetor; then remove the cover.
Description
p/n
Oil Pressure Test Kit
0644-495
Seal Removal Tool
0644-072
Tachometer
0644-275
Electric Choke Test Harness
0444-247
Item
400
650
Carburetor
Keihin CVK34
Keihin CVK36
Main Jet
138
138
Slow Jet
40
40
Pilot Screw Setting (turns)
1 3/4
2
Jet Needle
NAZG
NFKS
Idle RPM (engine warm)
1250-1350
1250-1350
Starter Jet
75
85
Float Arm Height
17 mm (0.7 in.)
17 mm (0.7 in.)
Throttle Cable Free-Play
(at lever)
3-6 mm
(1/8-1/4 in.)
3-6 mm
(1/8-1/4 in.)
! WARNING
Whenever any maintenance or inspection is per-
formed on the fuel system during which there may be
fuel leakage, there should be no welding, smoking,
open flames, etc., in the area.
KEY
1. Cover
2. Screw
3. Spring
4. Vacuum Piston
5. Spring Seat
6. Jet Needle
7. Needle Jet
8. Jet Holder
9. Main Jet
10. Slow Jet
11. Starter Jet
12. Float Valve
13. Clip
14. Float
15. Float Pin
16. Pilot Screw
17. Spring
18. Washer
19. O-Ring
20. Idle Adjust Screw
21. Washer
22. Spring
23. Plate
24. Screw
25. Electric Choke
26. Choke Cover
27. Float Chamber
Assy
28. O-Ring
29. Screw
30. Spring
31. Diaphragm Assy
32. Pump Housing
33. U-Ring
34. Screw
35. Screw
36. Throttle Cable
37. Cover
38. Screw
39. Vent Hose
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