Radial Master Cylinders

Race driven radial master cylinders with a built in reservoir. These masters deliver stunning performance and feel for any bike, with classic RSD styling and no need to mount a separate external reservoir. Fully adjustable levers and clearance for stock switch housings, this versatile system will drastically improve your brake/clutch system from the master cylinder down.



The race inspired levers on our Radial Master Cylinders are not only stylish, but customizable for any size mitt. Enjoy the comfort of adjustability and a wide finger pull area.

  • Race driven radial technology gets the most out of your stock or aftermarket brake caliper by increasing leverage
  • Compatible with OEM switch housings and CANbus wiring
  • 1” bar clamping diameter
  • Mirror mount clamp sold both with masters or individually
  • Twist adjuster easily modifies the lever distance from the handlebar
  • 2.5” of lever adjustment
  • CNC machined from billet aluminum
  • Brake light switch included
  • Lever surface shape designed for a comfortable and smooth feel
  • Brake masters available for 9/16” bore for single disc & 11/16” bore for dual disc applications/Clutch masters are 11/16" bore
  • Mounting hardware included
  • Machined RSD logo
  • Front brake light switch function not supported on 2014+ HD Touring models