Cycle Electric rectifier regulators control voltage from the stator to the battery. Unlike original equipment RRs that dump excessive volts to ground and cause the stator to work hard and create heat this RR only makes power when the battery needs it. The largest and most noticeable benefit is a smoother charge to the battery. This means less battery maintenance and longer battery life. The custom SZ version is especially made by Cycle Electric for our Suzuki LC/C90 with 36″ long leads and no plugs. 2 years warranty from Cycle Electric.
Typically these are mounted on an aluminum plate to the frame forward of the shifter. Following is a link to a detailed drawing on how to make your own. CE602