| Accurate Engineering: Custom engine builders of V-Twin motorcycles; includes performance modifications, restorations and machining. |
| Boyesen: High performance motorcycle aftermarket engine products. |
| BT-H Rexton Magnetos: Manufacturers of self generating magneto ignition systems and components especially for vintage and classic bikes. |
| Cometic Gasket: Motorcycle gaskets for on and off road motorcycles. |
| Earl's: Makers of fuel and oil lines, oil coolers and fuel caps. |
| Falicon Crankshafts: Specializes in the manufacture and improvement of motorcycle crankshafts and crankshaft related components. |
| Gasket Gasket.com: OEM replacement engine gaskets for bottom end, top end, and carburetor applications. |
| Indigo Sports: Motorcycle exhaust, parts and accessories. |
| JP Pistons: Manufacturers of pistons for vintage, veteran and classic motorcycles. |
| Magnetic Drain Plug.com: Specializing in oil drain plugs for motorcycles, cars, and trucks. Offers a magnetic design, to pull metal particles from engine oil to increase engine life. |
| Magnom: Unique magnetic filtration technology removes the super hard particles in oil, responsible for engine/ transmission wear. It filters ferrous debris to a finer degree than any stock oil filter and never needs replacing. |
| Mape: Designs and produces crankshafts and connecting rods for 2 and 4 stroke engines, 1 or more cylinders. |
| Micron Performance Exhaust: Highly polished aluminum, and super light aerospace grade carbon fiber race canisters. |
| Muzzys: Engine Kits, suspension parts, tools, and apparel. |
| Perf-form Oil Filters: Manufacturer of motorcycle oil filters. |
| Quick Shifter: Quickshifter and gear display kits for motorcycles and shifter karts. Also Motorsport Ports and technology, and dyno tuning. |
| Quickshifter: Allows full throttle up-shifts to improve acceleration on any motorcycle. |
| Translogic Systems: Supplier of electronic transmissions for motorcycles. |
| Tucker Motorcycle Supply: Offers motorcycle products, including piston kits, gaskets and exhaust. Located in Grapevine, Texas. |
| Wide Open Products: Manufacturer of high performance carburetors for Harley-Davidsons, off-road motorcycles and snowmobiles. Includes production and prototype machining services. |
| Wiseco: Manufacturer of high performance and racing motorcycle pistons. |
Classical
