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HB: Handlebars How to install horn button on new enameled bars

Mark Stephenson

Active Website User
VOC Member
Folks,

I put on some new black enameled bars on my Series B. Horn works. The horn button is original and works. I have scraped some paint off (purposely this time) so that one of the two tabs within the horn bracket should contact the metal bar. Rather than scrape the paint off all the way around the bar-is there another place I should try or am I going about this all wrong?



Picture attached of current config.92742FFC-61B2-49DE-B23F-C84C15B213A1_1_105_c.jpeg

Best

Mark
 

stu spalding

Well Known and Active Website User
VOC Member
Hi Mark,
With an AVO meter you should check that there is an earth connection between the bars and the earth side of the battery. It's highly unlikely that this is out but it is possible and can be fixed by removing enamel under the handlebar clamps, etc. Cheers, Stu.
 

Mark Stephenson

Active Website User
VOC Member
Interesting. Thanks so much. I don't have an AVO meter and would not know how to check anyway:)..>BUT, I might as well remove some enamel under the handlebar clamps--I think you are on to something as the horn rings when touch the bell to the handlebar bolts. Thanks. Will report back! Mark
 

vibrac

Well Known and Active Website User
VOC Member
Pinch a flat connector in the clamp bolt run a thin black cable to the horn clamp attach to a hornclamp screw of course if you have an all in one LH switch the horn feed is a positive feed and doesnt need to earth
 

bmetcalf

Well Known and Active Website User
VOC Member
I wrapped some thin aluminum around the bars to clamp the button to and then trapped a short wire under that and the other end under the handlebar clamp. A ground wire from the headlamp to the UFM is also good to have, otherwise the ground current goes through the steering head bearings.
 

Chris.R

Well Known and Active Website User
VOC Member
why not leave the paint intact. Get some dual core cable and use one core as intended and the other core to connect tween the body of the button and the frame
That is exactly what I have done run a dedicated earth from the horn button to the frame. I have done the same from the headlight with no interruptions along the way.
Chris
 

highbury731

Well Known and Active Website User
VOC Member
In a stress situation, you are likely to be needing throttle and / or brake. Better to put the horn button on the left so you can hit it easily. While you are at it, shuffle the lever locations so you can easily reach the button without moving your whole hand. When you are stressed, that counts....
I am putting a Miller combined horn / dip unit on the left, where I can reach both just by moving my thumb.
Paul
 

Mark Stephenson

Active Website User
VOC Member
In a stress situation, you are likely to be needing throttle and / or brake. Better to put the horn button on the left so you can hit it easily. While you are at it, shuffle the lever locations so you can easily reach the button without moving your whole hand. When you are stressed, that counts....
I am putting a Miller combined horn / dip unit on the left, where I can reach both just by moving my thumb.
Paul
Paul

Interesting point on the Miller combined Horn/DIP. Do you have a part # or pic?

Thx

Mark
 

highbury731

Well Known and Active Website User
VOC Member
Yes, that's the one i have. It's a recently-made replica. I also have an original Miller off/low/high switch with two buttons, which may get used on the other side as an indicator switch.
 

craig

Well Known and Active Website User
VOC Member
The original Lucas horn 4A 7/8 switch has a "cleat" punched into the mount strap that is designed to cut the paint and make electrical ground.

LucasVincentHornButton.jpg
 
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Colin

Well Known and Active Website User
VOC Member
When I rewired the Egli Comet some 30 odd years ago I put a separate earth ("ground " for our colonial readers) [ or is that not "PC"] {Oooohhh} wire on EVERY component that needed to be earthed. Overkill I know but I've not had any earth type problem since, and if I did the first thing I would look at would be the separate earth wire and earthing points
 

Denny653

New Website User
VOC Member
When I rewired the Egli Comet some 30 odd years ago I put a separate earth ("ground " for our colonial readers) [ or is that not "PC"] {Oooohhh} wire on EVERY component that needed to be earthed. Overkill I know but I've not had any earth type problem since, and if I did the first thing I would look at would be the separate earth wire and earthing points
Only half of the people in the colonies are PC...
 

craig

Well Known and Active Website User
VOC Member
Where does the Lucas 4A handlebar kill switch mount ?
I dont see a reference.

Are there period photos of B/C Vincents that show this kill button detail?
earthing button?
MO25HandlebarLayout.jpg

Or maybe a kill button doesnt belong on a Vincent,
 
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timetraveller

Well Known and Active Website User
VOC Member
I've been riding Vincents since about 1957 and I do not recall ever seeing a kill button on any original road equipped Vin in those days. The standard magnetos had no provision for it but there were people who fitted the 'competition contact breaker housing to some bikes to give them access to manual advance and retard. Those could be supplied with an end cap which allowed shorting out.
 
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