1972 Speedway Red Baron PART FOUR: Frame Assembly, Sebec and Betor Shock Rebuild, Wheels, Axles/Bearings, Swing Arm, Fenders. Part Three found at    • Speedway Red Baron PART2 Frame Prep m...   and Part Five found at    • Speedway Red Baron PART5 Front Forks ...   Video series Speedway minibike back from dead. This information also applies to Rupp minibikes rebuild