196cc
Light & Sporty
Crisp throttle and agile packages for smaller chassis.
212cc
Versatile Power
The Bobcat design: quick-revving 212 platform for tight tracks.
224cc
More power, more fun
The Mountain Lion design: 224cc torque-focused setup with big pull.
Want to race now?
Try our race‑ready, F1 style kart starting at $14,999.
Learn MoreAbout SPX Engineering
SPX Engineering is a small, enthusiast‑owned company obsessed with extracting every last ounce of performance from small-displacement engines. We hand‑build each motor from the ground up, using forged internals, race‑proven components and extensive dyno testing to ensure your build is not only powerful but also reliable.
Our mission is simple: deliver bespoke, race‑ready engines that inspire confidence and elevate your driving experience. Whether you're building a kart, mini‑bike or custom project, SPX Engineering gives you the tools to design an engine tailored to your needs.