Bonneville America Forums Forums Technical Forums Custom Corner Bore Master Cylinder

Looking to find out what size is the stock front bore master cylinder on Triumph America with single discs as I'm considering installing custom handlebar control kits.

I looked through the manual but this specification isn’t provided.

I don't know the bore size, but I think you can safely assume that most of the better V-Twin master cylinders out there (PM, Pro-One, Kuryakyn) will work just fine.

For those wanting to stay with Triumph controls, the Rocket III controls fit the Bonneville's (except Thruxton).

Mike

9/16 of an inch is cool for a single rotor..if you go with a dual you will nedd 11/16,that will give you enough fluid.