Now THIS sounds a little tricky!
German registration is tricky enough, when you actually buy a bike HERE, but importing a (as German customs would assume) "stolen" bike without paperwork, no exhaust-check, no roadworthyness...
This is a Link someone posted somewhere else and I bookmarked it - seems to be quite interesting!
Best bet would be to ring your Embassy and ask those guys - I'm sure there's someone else with the same problem somewhere!
I RECKON it would be easiest (and maybe cheapest) to BUY a bike here and sell it afterwards - as far as that I could help you out, you just need to worry about rego and insurance...
...you see - not every bike in Germany is registered, but every bike on German ROADS is (including roadworthyness and insurance)!
Ah - a little something I forgot - if you can get a fitting German FRAME for the bike with a vehicle-letter (the paperwork - I assume you know what I mean) and so on I'm sure you won't get a prob with the parts - but be carefull - the exhaust-concerning regulations can be pretty nervewrecking - ist your FRAME older than '89 you shouldn't get into trouble though ;-)
[This message has been edited by onlycookie (edited 03 September 2002).]