Hello Bill, Larry Driskill sells a fine threaded needle spraybar that will press into the existing aluminum venturi in a Norvel. These would be the venturi's that are glued in with epoxy. These needles look like a tigre needle. Most of the set ups that I've seen take the venturi out and the spraybar goes through the case. These of course would be using bladder setup. Doug Galbreath also sells a spraybar assembly. I've never used one of Doug's. Now if it is a needle you only desire, you just may be able to take a needle from a Cox production backplate (red one) as these had some 128 threads per inch needles. This may fit your spraybar , not all do though as there is another version as well. Texas Timers may be able to help you with the KK information you desire. Ken

I didn't have a fine thread Cox needle, so I tried one of the Texas Timers fine needles.

It appears that someone must have forced the Super Tiger needle that came with that engine, and damaged the threads. The TT needle will not screw in more than a fraction of a turn.

I doubt very much that the threads can be cleaned up with a tap, so I'm going to remove the KK unit, and install the original Norvel needle and spray bar.

Bill