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Broken Horn Casting - Repairable?

Technical help for Series one, two and three Lambrettas. Models include the Li, Li Special, TV, SX, GP, Serveta and API/SIL models

Broken Horn Casting - Repairable?

Postby davla » Sun Nov 15, 2020 7:37 pm

Is this horn casting repairable? I want to keep as much of the original paint as possible on the scooter so getting this repaired is preferable as opposed to replacing. (Just talking about the main cover as I have a NOS grill)

Image
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Re: Broken Horn Casting - Repairable?

Postby Warkton Tornado No.1 » Mon Nov 16, 2020 2:44 pm

It is repairable. The "How?" will be the debatable choice.

Probably the easiest way is to sacrifice an Indian horncasting for the complete bottom end & do a straight cut & shut somewhere between the top & bottom.

If maintaining as much as possible of the original is the priority, then you could fashion an alloy piece to fit that could even be thicker to the outside, allowing for final linishing/dressing of the repair. The choice, then, would be how to secure such a piece permantly in place. If welding, a good welder might choose to stitch weld the piece in place to attempt to avoid distortions, with or without yet another piece of alloy as an overlapping patch beneath the piece & the main casting.

That probably would be the method which I would follow as it would be something that could be assembled to the correct geometry prior to weld. I would even affix all three parts with self tappers or pop rivets to get it into shape prior to weld (the patch would be stitch welded on the inside) with subsequent removal of the temporary fixings, which would then also have their resultant holes welded up.

However, hopefully other contributors to this Post will offer their opinions of viable alternatives.

Good Luck with it! :D
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Re: Broken Horn Casting - Repairable?

Postby davla » Wed Nov 18, 2020 8:34 pm

The good news is that I've found someone to repair this, I saw a repair that he did on a S2 horncast on FB, amazing work. I don't suppose anyone has a scrap horncast for sale that's good where mine is bad as it might be useful? The cheapest I can find anything is about 80 quid and, apart from being sacrilage to cut up a good horncast, it's a waste of money.
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Re: Broken Horn Casting - Repairable?

Postby Toddy » Wed Nov 18, 2020 8:56 pm

davla wrote:The good news is that I've found someone to repair this, I saw a repair that he did on a S2 horncast on FB, amazing work. I don't suppose anyone has a scrap horncast for sale that's good where mine is bad as it might be useful? The cheapest I can find anything is about 80 quid and, apart from being sacrilage to cut up a good horncast, it's a waste of money.


If it’s the same guy I’ve seen doing work on FB he looks good ;)
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Re: Broken Horn Casting - Repairable?

Postby JETEX » Wed Nov 18, 2020 10:19 pm

I've seen that too, brilliant work.
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Re: Broken Horn Casting - Repairable?

Postby davla » Thu Nov 19, 2020 9:54 pm

He’s on the Lambretta Rebuild group
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Re: Broken Horn Casting - Repairable?

Postby Toddy » Sat Nov 21, 2020 4:27 pm

He’s on a few different groups with his work I think it’s Dean Stradling ? if it’s the same guy have a look on the Lambretta rebuild page
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Re: Broken Horn Casting - Repairable?

Postby Rich Oswald » Sat Nov 21, 2020 5:45 pm

Toddy wrote:He’s on a few different groups with his work I think it’s Dean Stradling ? if it’s the same guy have a look on the Lambretta rebuild page


Yeah that's the guy, he is very good indeed.
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