Author Topic: 400/4 OEM horn  (Read 1900 times)

Offline exvalvesetdabbler

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400/4 OEM horn
« on: May 08, 2025, 07:04:02 PM »
Trying to find out what the original finish on the horn bracket  and  nut that holds the horn to the bracket was, zinc plate or black enamel ?  The big slotted screw with the fine thread has zinc plate on it but I'm not seeing traces elsewhere.

I currently have a zinc plate bath on the go and getting the urge to plate anything that's a bit crusty.

Best Regards
Dave.

Offline Laverda Dave

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Re: 400/4 OEM horn
« Reply #1 on: May 10, 2025, 07:26:17 AM »
I'll have a look at mine later and let you know.
1976 Honda 400/4
1977 Rickman Honda CR750
1999 Honda VFR 800FX
1955 750 Dresda Triton
1978 Moto Morini 350 Sport
1978 Honda CB400/4 'The Flying Banana'
1982 Laverda 120 Jota
2020 Royal Enfield Interceptor 650
1990 Honda VFR400R NC30

Offline Toko_Jo

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Re: 400/4 OEM horn
« Reply #2 on: May 10, 2025, 09:27:13 AM »
Black chassis paint.

Offline Laverda Dave

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Re: 400/4 OEM horn
« Reply #3 on: May 10, 2025, 09:51:26 PM »
Toko is correct.
Looking at my original bracket it is painted black the same as the frame (original ones also have a a part code painted in white on the bracket itself, code is 12V  H with the letters 3A105db below it and 1 6 Q below that).
The horn itself is BZP with the large mounting nut and fine thread screw being yellow passivated (as are the two wiring spade connectors on the horn).
1976 Honda 400/4
1977 Rickman Honda CR750
1999 Honda VFR 800FX
1955 750 Dresda Triton
1978 Moto Morini 350 Sport
1978 Honda CB400/4 'The Flying Banana'
1982 Laverda 120 Jota
2020 Royal Enfield Interceptor 650
1990 Honda VFR400R NC30

Offline SteveD CB500K0

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Re: 400/4 OEM horn
« Reply #4 on: May 11, 2025, 06:58:14 AM »
(Confidently deciphers Honda’s cunning part code)

12 Volt Horn 3 Amp 105 Decibels.


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1971 CB500K0

Offline exvalvesetdabbler

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Re: 400/4 OEM horn
« Reply #5 on: May 12, 2025, 10:47:18 AM »
Thanks.

I have some dreg ends in a satin black rattle can so that will have to do.

After a winter rest it never works anyway until you press the button and whack it with a screwdriver handle. I did fill it up with WD40 and suck it out again with a syringe but that only lasted 3-4 years.

Regards
Dave.