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Klaxon Horn Problems on R 69S
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Klaxon Horn Problems on R 69S
- Darryl.Richman
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Klaxon Horn Problems on R 69S
Before you take the horn apart, mark how the diaphram (in front, under the grill) aligns with the horn body. You'll want to get this same alignment when you put it back together again.
Inside the horn is an electromagnet and a set of points. The points may need some cleaning or the surface refreshed with a points file.
You'll also see that there is a hexhead screw on the back of the horn. Inside, you'll see that this adjusts the "throw" of the horn's diaphram. When you reassemble the horn, this screw controls how loud the horn is. Within about 1 turn, the horn will go from not sounding to its loudest point back to not sounding. You'll probably find it most convenient to adjust it on your workbench with the bike's battery and a set of wires.
- schrader7032
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Klaxon Horn Problems on R 69S
The switch is what completes the circuit for the horn. This is not the best way to complete a circuit...switching the power side would really be better. Once you press the button (in my case), the ground path is the handlebars, through the steering stem bearings, then to the frame and ultimately back to the battery. That's a pretty circuitous route. Be sure the ground at the switch is as good as it can be.
I also did take the horn apart and cleaned the contacts which helped, too. The horn consists of a wire coil surrounding a piece of steel. When power is applied to the coil, the steel becomes a magnet, which in turns pulls on a lever which breaks the power to the coil. This cycle repeats over and over which causes the sound. There's a screw on the back of the horn which adjusts the gap between the steel and the lever.
There's a little information here on the horn:
http://www.snafu.org/restore/1998-11/
Kurt in S.A.
'78 R100/7 '69 R69S '52 R25/2
Fast. Neat. Average. Friendly. Good. Good.
horn
http://en.wikipedia.org/wiki/Klaxons
1962 R69S, 2006 M5, 2000 Aprilia RSV Mille R, 1997 Defender 90, 2007 Benelli M4
done
thanks much for this posting - glad to have the original klaxon sounding off again.
1962 R69S, 2006 M5, 2000 Aprilia RSV Mille R, 1997 Defender 90, 2007 Benelli M4
Thanks for the Tips...
Klaxon Horn Problems on R 69S
1962 R69S, 2006 M5, 2000 Aprilia RSV Mille R, 1997 Defender 90, 2007 Benelli M4
- schrader7032
- Posts: 9016
- Joined: Fri Oct 27, 2006 3:00 am
- Location: San Antonio, TX
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Klaxon Horn Problems on R 69S
http://vintagebmw.org/forums/viewtopic.php?t=537&
One thought was that it was useful for pulling a bike with sidecar from the rear.
Kurt in S.A.
'78 R100/7 '69 R69S '52 R25/2
Fast. Neat. Average. Friendly. Good. Good.
Klaxon Horn Problems on R 69S
Pat