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Carburetor Adjustments & Tuning Tips
SPECIAL TUNING CONDITIONS
ere are some unique atmospheric conditions or situations that may
require additional adjustments. It should not be necessary to go more
than one jet size richer or leaner to ne tune your umpstar. If larger
jetting changes are necessary, check for air leaks, blocked or restricted
exhaust or fuel systems, or a dirty air cleaner.
Condition Main Jet Adjustment
Long Straights
Next Larger
Uphill Sections
Sand
Mud
High Humidity
Next Smaller
Raining
Hotter an 113 °F (59 °C)
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