1939 Delco horn for knucklehead

[Rod E]

I have a Delco horn I just bought and it is a 6 bolt pattern, I think I need a nine bolt. If I put this on and have it Judged someday will points be taken off? If I need a 9 bolt where do the missing 3 holes go? I have a shop and can drill them if I know where they should be placed. Also do the terminals go up or down when mounted. Thanks Rod

[Chris Haynes]

Borrow a 9 screw horn and copy the pattern. Note that the holes in the outer face are square. Find a fabricating shop that can punch the square holes for you. There is no other differences between the 6 and 9 screw horns.

[Perry Ruiter]

Pick up the phone and call Harbour Vintage. Ask for a 9 bolt upper ring for a Delco horn. $25 and you've got your template for the other three holes ... Perry

[jorrow]

Hope this helps..

[jorrow]

Ninth hole...

[46EL]

chief348@juno.comSend me an email to the attached link in this message. I can send you photos of a Horn I just converted. I can also send a photo of a Horn with all the brackets and hardware attached that I was just ready to mount on a bike. The harbor Vintage idea is a great one and that will give you the bolt pattern you need.

[Rod E]

Thank you for the 2 pictures that really helps.

[Rod E]

Borrow a 9 screw horn and copy the pattern. Note that the holes in the outer face are square. Find a fabricating shop that can punch the square holes for you. There is no other differences between the 6 and 9 screw horns.

Thanks Chris, do you know if the 2 electrical terminals will be located on the left side as you look at the bike from the front?

[Chris Haynes]

When looking at the rear of the horn the terminals will be in the 3 o'clock position.

[Barry]

Besides adding the extra holes how do you get the mounting bracket off without any damage? Barry

[jwl]

You didn't say you had a 6 bolt with a mounting bracket. That gets a little tougher. You are probably better off finding a 6 bolt horn without a bracket attached. The brackets can be removed by unriviting it but it is a real chore to rerivit the back on once the bracket is removed.

[Rod E]

Thanks

Hi, mine had no bracket, worked on it all yesterday and got it on the bike thanks to all that helped.

[Rod E]

1939 EL with horn mounted

Horn on bike horn .jpg

[Chris Haynes]

If you horn had a good bracket on it trade it to someone who has a broken bracket. I have several.

[Perry Ruiter]

When looking at the rear of the horn the terminals will be in the 3 o'clock position.

So are we to take from this picture that the only perimeter nuts that are cad plated are the three for the face with the remainder parkerized (or painted?)? ... Perry