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Anatomy of a 400/4 Horn (also CB250/360 G5)

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ozzybud:

--- Quote from: Laverda Dave on June 08, 2024, 09:47:53 AM ---Wow, that price is eye watering  :o. Just shows how expensive these individual parts are becoming and why it is difficult to justify restoring a bike to original spec and then of course you have to ask yourself the question 'If I have spent all this money restoring it should I ride it and ruin it'. This is why I'm trying to restore Ratty back to stock but have no problem using stainless fasteners where I can for practical reasons. I do however remove the stampings from the bolt heads and polish them to give a decent finish.

--- End quote ---

I got it for far less than the asking price. just made a low offer and they accepted.

I have the OCD gene that makes me want to restore as close to original as possible.. And I do ride all my bikes.

I was restored myself with a heart transplant 13 years ago . So i live every day to the fullest. Would be a shame to just look at a pretty bike then let someone else ride it after i pass..

McCabe-Thiele (Ted):

--- Quote from: ozzybud on June 08, 2024, 04:10:05 PM ---
--- Quote from: Laverda Dave on June 08, 2024, 09:47:53 AM ---Wow, that price is eye watering  :o. Just shows how expensive these individual parts are becoming and why it is difficult to justify restoring a bike to original spec and then of course you have to ask yourself the question 'If I have spent all this money restoring it should I ride it and ruin it'. This is why I'm trying to restore Ratty back to stock but have no problem using stainless fasteners where I can for practical reasons. I do however remove the stampings from the bolt heads and polish them to give a decent finish.

--- End quote ---

I got it for far less than the asking price. just made a low offer and they accepted.

I have the OCD gene that makes me want to restore as close to original as possible.. And I do ride all my bikes.

I was restored myself with a heart transplant 13 years ago . So i live every day to the fullest. Would be a shame to just look at a pretty bike then let someone else ride it after i pass..

--- End quote ---

Blimey a heart transplant  that some heavy duty surgery - Dick Cheyeney (ex USA VP) is still going well with his at 83 years- respect to both of your restorations!

AshimotoK0:
Well I got a really nice Honda Mitsuba horn that will re-plate beautifully but it was completely dead and non of my methods described in this thread worked to revive it :(

So put my thinking cap on and used the rig below which zaps a few hundred volts of high frequency AC (12v-> high volts inverter) across the horn terminals via a 33 Ohm limiting resistor. The inverter was modified as the output in normally 50Hz but I bypassed all that and simply  used simply the high-frequency output from the inverter transformer   Worked a treat and you get an audible fizzing when you get conduction and the corrosion is being eroded away. This is my go-to method in future for sure.

Had the inverter PCB module for ages but it basically came out of something like this one.

https://www.ebay.co.uk/itm/185519092553

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Laverda Dave:
You have a bit of a production line in horns going on there Ash 8). All those electronics in something costing just over £5! I remember when I was in the electronics club (it was an after school activity to keep us off the streets) in the 70’s we made a lie detector. To make it we had to buy a new piece of technology called an Integrated Circuit Board, it cost a small fortune. Tomorrow's World called them the future and they were right. Amazing how cheap all this technology has become.

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