i was adjusting my carbs, and i loosened my sync screw for cylinder one too far. the screw fell out and made its way to the floor, but ill be damned if i can find the spring. how necessary is this spring? does it keep the screw from vibrating and self adjusting?

 

Sure does just that. PM me an address and I'll send you what you need.

 

Go to Home Depot Racing.
That's where I get my Racing screws, aluminum panels, isolating foam, insulating tape, cables, etc.
Or take a thick pen, that has a spring inside and take it out.
VOILA, done!!!