Case Stamping Etiquette

S

Scout63

Junior member
Location
Orleans, MA USA
I’m wondering what is acceptable when stamping new cases. I purchased a 500 Montjuic in parts from a forum member recently. It has matching numbered frame and crankcase and title, but the case is damaged where a rod came out the front. Stuart gave me a new unused and unstamped case which I will use to build the engine. Can I stamp the old numbers on the new case? Is there an established way of noting replacement cases? I was thinking of cutting the numbers out of the original case and fashioning a key chain to keep with the bike. I don’t want to unintentionally misrepresent any aspect of the motorcycle. Thanks - Ben
 
General comment, getting any changes to look factory isn't easy. I think there are odd shapes that don't come in your typical number punch kit. Getting the depth even close is hard. BTW I bought my kit as a 16-year-old Apprentice to punch my name into my tools. Years ago you could get a replacement Ducati frame but they insisted you cut your damaged frames gooseneck off and give it to them. Punching the new frames numbers is something I didn't hear about.
 
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Scout63 said:
I’m wondering what is acceptable when stamping new cases. I purchased a 500 Montjuic in parts from a forum member recently. It has matching numbered frame and crankcase and title, but the case is damaged where a rod came out the front. Stuart gave me a new unused and unstamped case which I will use to build the engine. Can I stamp the old numbers on the new case? Is there an established way of noting replacement cases? I was thinking of cutting the numbers out of the original case and fashioning a key chain to keep with the bike. I don’t want to unintentionally misrepresent any aspect of the motorcycle. Thanks - Ben
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I think you need to restamp w/ original #'s as there may be a need to retain the match if bike is retitled in states/countries that record engine #. Perhaps note on registry if one exists. Good idea to save the old case, you may be able to laser weld repair it!
 
Andy said:
If it were me I’d leave it unstamped and keep the complete damaged case as an explanation.
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My 750SFC threw a rod back in the day which trashed the case. New unstamped case supplied under warranty and has been that way for well over 40 years. If and when I sell the original cases go with the bike. If you want to restamp finding the original factory stamps would be an issue.

Recently saw a restamped triple motor where the original numbers had been removed therefor loosing the original sand cast finish and a genertic stamp used to restamp. Looked totally dodgy to me even though it was done legit. Personally I wouldve just gone with the non matching number and change the documents to suit. By restamping your not fooling anybody that knows anything about Laverdas.
 
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I would leave the cases unstamped and try to get the original cases repaired. Advances in 3D metal printing is making almost anything possible.
 
Hi Paul. I meant ethically acceptable. In other words is there a standard for dealing with these situations. It sounds as if I should leave the new cases unstamped and hold the original cases. I can present them for a VIN check when titling.
 
Scout63 said:
Hi Paul. I meant ethically acceptable. In other words is there a standard for dealing with these situations. It sounds as if I should leave the new cases unstamped and hold the original cases. I can present them for a VIN check when titling.
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A personal opinion.
If you do it, use the original font.
The only people who regularly stamp cases are people building fakes.
Paul
 
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