Thumpstar KXD - Standard Tuning Recommendations; Adjustments for Altitude & Temperature

26
Carburetor Adjustments & Tuning Tips
STANDARD TUNING RECOMMENDATIONS
For the following recommendations to be accurate, you must use the
standard settings as a baseline. Also, don’t change any of the settings
until you’ve determined what changes are necessary.
Adjustment TSX-C 125 SW - VM22
Standard Settings
Pilot / Air Fuel Screw Opening 1–3/4 Turns Out
Slow/Pilot Jet #15
Needle Clip Position 3rd Groove
Main jet #95
Adjustment TSX-C 140 BW - VM22
Standard Settings
Pilot / Air Fuel Screw Opening 1–3/4 Turns Out
Slow/Pilot Jet #20
Needle Clip Position 3rd Groove
Main jet #110
Adjustment TSX-C 140 BW - VM26
Standard Settings
Pilot / Air Fuel Screw Opening 1–3/4 Turns Out
Slow/Pilot Jet #20
Needle Clip Position 3rd Groove
Main jet #100
ADJUSTMENTS FOR ALTITUDE & TEMPERATURE
All jetting recommendations are based on standard jetting with an
unmodied engine. e following conditions can aect the fuel mixture
Condition Mixture Will Be Adjust To Component
Aected
Cold
Temperature
Lean Richen
Main Jet
(Jet Needle Stage)
Warm
Temperature
Rich Lean
Dry Air Lean Richen
High Humidity Rich Lean
High Altitude Rich Lean