Revolutionz USA carries the full 100cc kart engine lineup including the IAME KA100 Senior, IAME KA100 Junior, Vortex VLR Senior, and Vortex VLR Junior. The KA100 is one of the most popular and widely supported classes in US karting — known for its reliability, low maintenance cost, and close racing. Every engine ships blueprinted, broken in, and dyno-tested from our shop in Carlsbad, CA.