These genuine ISR threaded master cylinder clamps offer a direct fit replacement for your ISR master cylinder and allows you to mount mirrors.  Thread size is M10 x 1.25mm and they are available with either RH or LH threads.  Available for either 7/8" (22mm) or 1" (25.4mm) handlebars, make your selection above before adding to your cart.  The replacement clamps have no switching capabilities, please see the ISR 73-100 or 73-200 series of switch clamps for this capability.  Includes the threaded clamp and four stainless steel mounting bolts.


The right hand (RH) clamps will tighten with clockwise (CW) rotation.  The left hand (LH) clamps require counter clockwise (CCW) rotation to tighten the mirrors.  The clamp kits fit all of the following ISR master cylinders, either clutch (LH) or brake (RH):

• 21-005
• 21-006
• 21-011
• 21-012
• 21-013
• 21-014

We supply ALL ISR brakes and replacement parts, please inquire if you do not find what you are looking for.