This is the throttle lever for the Dellorto DHLA series carburettors as used on the Lotus 2.0 and 2.2 liter engines.
This is item number 104 in the drawing.
Required quantity per set of 2 carburettors: 1
It matches Balance Lever number 8304 (item 100 in this list).
It uses lotusbarrel to hook up the accelerator cable.
Dellorto Part Number: 10509
Dellorto, Weber and Solex Carburettors Spare Parts Jets Chokes Emulsion Tubes Service Kits