HoHey Designs stunt handbrake junction valve adapters are the perfect solution for any bike.  If you are looking to run a handbrake without buying a dual caliper bracket, this is the solution.  CNC machined from aluminum and anodized in a Green finish.  Comes with stainless steel banjo bolt and crush washers.  You can also add a 55" or 80" rear brake line to the setup if you need from the below options.