The, what seems unlimited, growth of rear tire width has driven the Custom Bike Builders to the "Outer Limits" of offsetting primary drives in existing frames. The 55mm offset kit is really the limit of what is possible. To keep the balance in a bike that is converted to accept the 330 tire, it is better to leave the primary in its original position and move the final drive over to the right side. To date this required a complete Right Side Drive transmission, making the conversion quite expensive. When Zodiac started to develop a conversion kit to allow the use of 330 wide rear tire in a stock Twin Cam Softail frame they also looked for a more cost-effective solution. We came up with two solutions, the RSD conversion kit, that re-uses as many stock parts as possible, and the RSD builder's kit. The conversion kit just includes the parts that are needed to convert your stock 1994 or later transmission into a RSD transmission. Included are a main shaft, counter shaft with integrated fifth gear for improved strength, shifter drum and shifter forks, plus a new trap door that gives room for the main drive gear. We have completed the kit with the required hardware, new seals and gaskets and there it is, "The most economic Right Side Drive Conversion Kit". As we are aware that some people do not want to rebuild their transmission we also have a complete and ready to install "Transmission Builders Kit" available. Builder's kits have 1994 to present style "Low Noise" gears installed on the shafts and trap door. RSD transmission conversion kits are available for use up to 330 wide rear tires and can be used in stock and aftermarket transmission housings of the Evolution Softail, Evolution Dyna, Evolution FLH/FLT, Twin Cam Softail, Twin Cam Dyna and Twin Cam FLH/FLT. Kits come complete with a special transmission pulley. All RSD conversion and builders kits use a special RSD clutch actuator/pulley cover, which is separately available. Clutch actuators are available in hydraulic or cable operated. The cable operated clutch actuator works with stock Big Twin clutch cable, the hydraulic operated clutch actuator requires an 11/16" bore master cylinder. We have OEM style and Custom Style clutch master cylinders available, check out our Handlebar Controls section.

Note: 2000 and later models require some extra parts for the conversion that must be ordered separately. These parts are available in a kit as well as individually.