OEM and performance main crankshaft bearings for all major kart engines including Rotax, IAME X30, Leopard, KA100, Mini Swift, Vortex Rok GP, VLR, Mini Rok, Rok Shifter, TM KZ, Briggs & Stratton, Clone/Honda engines, and more. Stock includes high-RPM crank bearings, C3/C4 tolerance bearings, left and right main bearings, upgraded race bearings, and complete crank bearing sets. All components are high-quality kart racing bearings designed for durability, smooth rotation, and maximum reliability under competition loads. Contact us if you need any crank bearing not listed.