Polaris TRAIL BOSS 325 2001, Manual

Page: 27 / 296

MAINTENANCE
2.9
IDLE SPEED ADJUSTMENT
1. Start engine and warm it up thoroughly.
2. Adjust idle speed by turning the idle adjustment screw
in (clockwise) to increase or out (counterclockwise) to
decrease RPM. (Refer to Ill. at right).
NOTE: Adjusting the idle speed affects throttle cable
freeplay and electronic throttle control (ETC) adjustment.
Always check throttle cable freeplay after adjusting idle
speed and adjust if necessary.
PILOT SCREW (IDLE MIXTURE) ADJUSTMENT NOTES
Do not tighten the pilot screw forcefully against the seat or the screw and/or seat will be permanently dam-
aged.
Start engine and warm it up to operating temperature (about 10 minutes). This is a very important step.
PILOT SCREW ADJUSTMENT
IMPORTANT NOTE: Idle speed is specified with the lights OFF. On the idle speed will drop between 100-150 RPM
when the lights are turned on.
1. Connect an accurate tachometer such as the PET
2100DX (P/N 8712100DX) or the PET 2500 (P/N
8712500).
2. Adjust idle speed using the idle speed screw to about
1600 RPM.
3. Turn the pilot screw (mixture screw) in or out slowly
using the pilot screw wrench to obtain the highest idle
RPM.
4. Re-adjust idle speed to specified RPM (1300
r
100).
5. Again turn the pilot screw in or out slowly to obtain the
highest idle RPM.
6. Turn the pilot screw out (counterclockwise) 1/8 to 1/4
turn.
7. Re-adjust idle speed to specified RPM (1300
r
100).
Idle Speed:
1300 RPM
r
200
Idle Screw
CV Carburetor
Pilot Screw
FRONT
(Engine)