Spacebug Racing Carburetor

Marks .049 Collectors Group has some photos of a "Hop Up Kit" for the Space bug. I'm sure he could provide info about it.
Photo from his site

Thanks for the picture. I guess it needs a special tank to work with the Racing Head. I wonder how you can tell if the tank has the racing carburetor? Andy

All it is is a high comp head and an enlarged venturi.

It's something you can do on your own, problem is once it's done it's not reversable.

The "Hop-up kit" picture, is one i bought from Mud, hopefully he'll post something, as he know more about it than anybody.

Here's what i know and what i think i know:

-They were made 1953 for only one year, this is where you can realistically say its pretty rare.
-The glow head was a special high compression version, which i think was what the very first versions used was and was quickly changed (lower compression) to make them more user friendly.
-The air tube on the tank is slightly larger inside diameter then the first version, this soon became standard the following year?
-This is ture of the venturi as well. first couple(?) years it was the acorn style.
I'm speculating that Cox had a bunch of the first run hicomp heads left over and right before they introduced the new tank and horn type venturi, they sold them as the hop up kit.