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Carburetor Adjustments
Idle Speed Adjustment
1.
Start engine and warm it up thoroughly.
2.
Adjust idle speed by turning the idle adjustment
screw. See illustrations 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.
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Throttle Cable
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Electronic Throttle
Control (ETC Switch) Adjustment
1.
Slide boot off throttle cable adjuster and jam nut at
throttle block.
2.
Place shift selector in neutral and set parking brake.
3.
Start engine and set idle to.
NOTE:
Be sure the engine is at operating temperature.
See Idle Speed Adjustment.
4.
Loosen lock nut.
5.
Turn cable adjuster out until engine RPM starts to
increase.
6.
Turn cable adjuster back in until throttle lever has
1/16"
(.16 cm) of travel before engine RPM
increases.
Be sure ETC switch plunger is held
inward by throttle cable tension.
7.
Tighten lock nut securely and slide boot completely in
place to ensure a water-tight seal.
NOTE:
On 2 stroke models, whenever throttle cable ad-
justments are made, always check oil pump adjustment.
Refer to pages 2.19 2.20 for adjustment procedure.
8.
Turn handlebars from left to right through the entire
turning range. If idle speed increases, the throttle
cable freeplay must be increased, or check for proper
cable routing.
Throttle Operation
Check for smooth throttle opening and closing in all han-
dlebar positions.
Throttle lever operation should be
smooth and lever must return freely without binding. Re-
place the throttle cable if worn, kinked, or damaged.
5/98
2.11
MAINTENANCE
Carburetor Adjustments
425/500 Engines
Idle Screw
- - - I r n r J
250/300/400
Engines
1/16"
Th rottle
Lever Freeplay
Switch Plunger Must
Be Held In By Cable
Tension
Polaris Industries Inc.
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Table of Contents
Troubleshooting
