Front brake light switch

[bsa-bill]

I said

might be worth contacting (Turners I think)

but Richard said

I buy my switch from Venhills

And now I think it was Venhills but also some interesting stuff coming out of this electronic and so forth, all to fool folks into thinking we have brakes

[kiwipom]

hi guys, I was thinking of this problem and wondered if a `Mercury switch 'would be useful. On searching for Mercury switches I found this..... looks like it`s been done what do others think,cheers

My motorcycle, has a lot of engine braking, so I'm often slowing down just on throttle without touching the brakes. That means I'm open to getting rear ended by an in-attentive driver. Conventional wisdom is to touch the brake pedal when doing this, but it's easy to forget to do that.
I installed this with one wire to the battery +ve, and the other tapped into the normal brake light power wire, near the brake light. I stuck the sensor on the top of my rear mudguard, under the pillion seat, at a rough 25 degree angle.
Now my brake light comes on whenever I slow am slowing down, whether or not am using the brakes.
   

[bsa-bill]

I found this..... l

  - what would that be then 

Way back early sixties my uncle  had an AJS that had a mercury switch fitted, simple but effective little device, although descending steep hills ?????
I wondered if such things would have fallen foul of elfin saftey