Welcome to Ursus Technical Information.. This page links you to a network of Technical Information which we hope you find useful. We hope to update these regularly. If there is any information we can find for you, please Email us. Reference:   BIG TWIN MODELS 1971-2002 SPARK PLUGS BIG TWIN MODELS 1971-2002 BATTERIES/CHAIN/BELTS BIG TWIN MODELS 1971-2002 SPROCKETS   SPORTSTER MODELS 1971-2002 SPARK PLUGS SPORTSTER MODELS 1971-2002 BATTERIES/CHAIN/BELTS SPORTSTER MODELS 1971-2002 SPROCKETS   BIKE MODELS   How To: FIT A SUPERBRACE