This kit is for use on 7/8" handlebars. This kit is a direct fit the DB30 series bikes that have the rear disc brake only.
This mini bike hydraulic brake is not a direct replacement for other Minibikes, MUST Cut and Relocate Original Brake Bracket to fit for Coleman CT100U and Make a New Mounting Bracket to work on Motovox and MMB80/105
This can be adapted to other minibikes/go karts, but brackets will need to be fabricated. Master cylinder is filled with fluid, but may need to be bled before use.