Hi Dave

I don't actually know the answer but if XXA is Autocycle and XXE is Excelsior then perhaps XXF could be Francis Barnett?

My Mk1 Welbike just has XX with no third letter, but I'm pretty sure it didn't start life with this engine.

Lex may be able to tell you more.

Rob

email (option): robmiller11(a)yahoo.co.uk

According to the research and books written by Orchard & Madden, Peter Miller and Rob Van Meel, all Welbike engines are prefixed XXE. Ron


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email (option): ronpier@talk21.com

Thanks Rob , I was curious with XXF, first time I've seen this prefix .I forgot to mention I have also seen a Welbike with SER prefix possibly post war ? and blank no prefix or number .

I would imagine a few out there have had engines or cases replaced due to damage at some point .

Dave

email (option): davemb42@yahoo.com

Thanks Ron

email (option): davemb42@yahoo.com