brake master cylinder with switch?

[jpcjguy]

Hi all,

Have a hammerhead 80T that has this style master cylinder:

Looking for a version that has that round area tapped for a brake switch. Can't seem to find one - or has anyone drilled and tapped one?

Thanks!

 

[mckutzy]

Could go with something like this option...
Banjo bolt brake light switch...
Just need to get one with the same bolt threads as your MC.....

https://www.ebay.com/itm/Motorcycle...witch-Banjo-Bolt-10mmx1-0-Pitch-/182585042927

 

[karte_m0lim]

Instead of drilling master, just put this:

 

[65ShelbyClone]

or has anyone drilled and tapped one?

The difficulty level in doing that would depend on what kind of thread the hydraulic brake switch has. If it has a pipe thread, it will be easier to DIY, but you'll have to be careful not to split the boss. If it's a banjo fitting, then the top of the boss will have to be smooth, flat, and perpendicular to the threads for the crush washers to seal.

The tee adapter is a viable add-on option as shown above. Another is to install a motorcycle brake switch on the pedal.

 

[Ebrownie]

Finding a brake switch banjo bolt is probably your best option, but if you can’t put a switch on your master cylinder, use a microswitch on a linkage or on your pedal. I did it with my kart and it works great. Just buy some little cheap microswitches with the roller on the switch arm, and mount it up where it either opens or closes when the pedal is pushed.

The beauty of a microswitch is that you can do it either way; you can close the circuit by either pushing the switch or releasing it, depending on which terminals you hook up.

This is how I did it on my kart. I put a linkage between my pedal and the arm that moves the master cylinder and put the microswitch on the arm, but I suppose the pedal would work too.