Does any one know what wires to connect an electric horn to on the harness of a 03 290 cos my mot man is fussy and wont let me use a battery powerd one I still have the original lighting kit and handlebar switch have looked at shecos wiring diagram and cannot make head nor tail of it

Start it up and check with a meter for ac volts but i cannot see what is wrong with a battery one as long as its loud enough

Dave

Your MOT tester is wrong the audible warning device (horn) requires to emit a constant note regardless which way it's powered. There is no stipulation that it should run from the bikes' electrical system.

Regs HERE D.

Ask around in your area for an MOT tester that knows and tests trials bikes, might be easier to get a pass.

Your MOT tester is wrong the audible warning device (horn) requires to emit a constant note regardless which way it's powered. There is no stipulation that it should run from the bikes' electrical system.

Regs HERE D.

Correct.

I took the lights off my Scorpa for it's first MOT (they don't meet the requirements anyway.) I then plugged a cheap horn into the live headlight wire and used an old kill switch to operate it on the earth side.

Here's an example fo a cheap horn. CLICKY

AS it turns out chaps the soultion is really quite simple.

If you remove the tank and have a dig in about in the wires above the radiator you will find 2 wires about 2" long 1 blue 1 yellow which come out of the harness together with right angled spade conectors on end all you need is a 12v horn ideally from a trials lighting kit as the supply is A.C. I have used one from a montesa kit and this gives a reasonable sound.