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Thumpster only runs with choke on and revs high. basic carby settings please

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Thumpster only runs with choke on and revs high. basic carby settings please help. Bowl full of fuel but not over flowing. Have tried different air/fuel mix screw settings but little difference. Have tried needle clip settings, seems to only like low settings. Any suggestions?

 

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Thumpster only runs with choke on and revs high. basic carby settings please help. Bowl full of fuel but not over flowing. Have tried different air/fuel mix screw settings but little difference. Have tried needle clip settings, seems to only like low settings. Any suggestions?

I think you need to start with some basic carby cleanings.  Then one and half turns out on the fuel air and one turn out on idle.

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