That's their older 1 1/8" oval kart. mid to late 90's. Jimmy started making them about the same time we built our first Vector DO kart (1993). VERY similar in design.
Great kart on temporary tracks, grass tracks, or even ice racing. We still build and sell a few of our Vector DO chassis for just these applications.
Looks Like my White Piranah, except my right side nerf bar comes into the chassis at an angle more toward the front right tire.... Still trying to find someone that can make me some nerf bars for my Piranah.....