[Spridgets] Carbs LBC content

[Jack Laird]

H1 carbs.

I have been haveing more problems than the law allows. Think I have solved
most of them now but.

When I put the unisync to one of the carbs it covers the(1/4") hole in the
body that goes inside and causes the engine to jump maybe 1K rpm. The hole is
next to the large hole in the body inside which is the butterfly. I always
thought it was an air balance thing.

What is that hole for and why would it now be doing this. You can also put
your thumb on the hole and raise the rpm.

HELP