Wanted, Needle Valve for an OK Reed Valve Engine

I found a little model Go-Kart thats about 6" long and its got an OK engine that powers it. The engine has twin exhaust stacks and its a reed valve like a Cox. (it looks to be about .020 size) I need a needle valve and spring, if anyone has got one to sell I'd like to buy one.

The little Go-Kart has an aluminum body and there's a (blue plastic)little guy that rides on a (red plastic) seat. It has aluminum rims and real rubber tires. I don't know who makes it but it doesn't look like it's ever been used.

I figure I'll make a tow body for it and haul my stunt plane out to the flight line with it. (smiles)

You sure this is an OK engine and not a Gilbert? Either way, if it is new, I might be thinking "E-Bay!" It would be a shame to run it.

This is probably the OK go kart. It was powered with an .024 motor and was of course a tether model. The motor was anemic and it came at the end of Herkimer motors AKA OK Cub's existance.
They show up from time to time and as always price is according to condition with NIB being the most desireable state.
Dennis

It has "OK" on the engine case and it's a tether car.

Dankar, the engine in question is a OK Cub .024. It was answer to Cox .020. It was a good little engine and is quite rare to find. They did make a cart for it. Dankar