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

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?

 

Does it run better with the clip higher up the needle or lower down it?

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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