The accelerator pump circuit for the W-1 has:

(A) bracket bolting to throttle shaft with a round hole that becomes elongated
(B) Rod from bracket (A) to cross arm which wears a groove

If either the bracket or the rod wear as above, a hesitation can certainly occur. Replacing these parts often will eliminate a hesitation if the carb is the culprit.

A misfunctioning distributor will also cause a hesitation.

Jon.

Good carburetion is fuelish hot air
The most expensive carburetor is the wrong one you attempt to modify.
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