The Motori Seven L8 Jr shifter kart engine is a high-performance, Italian-engineered powerplant designed specifically for developing young racers. This exciting platform offers them the opportunity to train 100% as real KZ drivers.
The inclusion of the 6-speed gearbox from an early age is the fulcrum of this new engine that incorporates all the basic characteristics of a KZ 125 kart engine.
“With all the focus on Jr shifters lately we thought we would introduce a new product to the West Coast that is sure to impress,” tells Challenge of the Americas promotor Andy Seesemann. “The Seven L8 Jr. is a purpose built 80cc KZ style shifter engine with factory paddle shift, and I have one mounted up on a chassis for demo runs. For those wanting to give it a try come by the FTK trailer on the unofficial practice days.”
Designed with the same precision and racing pedigree as the senior L8, the Jr. version features a smaller displacement (80cc) and tuned power delivery to suit junior class drivers, offering a perfect balance of speed, control, and safety. With a six-speed paddle gearbox, liquid cooling, 24mm Dell’Orto VHST carburetor, and 25HP, the L8 Jr. gives young drivers an authentic shifter kart experience while maintaining manageable power levels for developing skills. Want to bridge the gap between Cadets and KZ, this is the motor for you.
We get it. People are busy. No need to wine, we hear ya. Last Call pre entry pricing has been extended until midnight tonight. So register for Sonoma now.
Registration for rounds 5/6 of the Challenge in Sonoma, CA. at Sonoma Raceway is open. Pre entry deadline is April 15th. Any entries posted after midnight are subject to a $250 late fee.
The 18th season for Challenge of the Americas is set to begin over the January 31-February 2 weekend when the series visits the Musselman Honda Circuit in Tucson, Arizona. The opening rounds of the 2025 championship will usher in a new era, welcoming the new Shinko Racing Kart Tires as the official tire for the series while expanding to four events to make the Challenge the headline traveling series in the western half of the United States.
As many of you have noticed, the Challenge of the Americas FaceBook page has disappeared. Our social media manager seems to think it is the North Koreans targeting us because we are excited to use Shinko Racing Tires in 2025, but I haven’t ruled Sean out as a suspect. That guy will do anything not to post “don’t forget to register.” So as we appeal our situation please frequent our homepage