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Old 02-01-2013, 09:13 PM   #1
roguetek OP
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Odd bit of history.

So I rescued a '74 R90/6 from the scrapheap, and I'm in the process of fixing it up.

I came across two oddities.

1. Inside the fairing, there's a data plate, in Arabic.

2. Someone installed decompression lifts at the cylinder bases, only reason you'd do that is you lived somewhere where you could not get 'good' gasoline...

any thoughts on how to possibly track the history of this beast?
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Old 02-01-2013, 09:18 PM   #2
Kt-88
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Mine has decompression spacers at the base of the jugs. It's a 75.5 r90/6. The ID plate is certainly cool! Can you post pics?
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Old 02-01-2013, 09:41 PM   #3
roguetek OP
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Sure, as soon as it's light out, I'll see about taking pictures.
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Old 02-01-2013, 10:01 PM   #4
Rob Farmer
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put the vin plate details in here http://realoem.com/bmw/select.do to find out if it's euro or American spec and the built year.
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Old 02-01-2013, 10:13 PM   #5
roguetek OP
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10/1973 2476 R90/6 Europe

So it was originally European.

Interesting. Wonder how it got here.
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Old 02-02-2013, 12:01 AM   #6
Rob Farmer
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Quote:
Originally Posted by roguetek View Post
10/1973 2476 R90/6 Europe

So it was originally European.

Interesting. Wonder how it got here.
Adds a bit more interest to it?

Is the fairing a BMW one?
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Old 02-02-2013, 07:09 AM   #7
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I'd guess maybe a former middle eastern police bike which later became a US military personnel bring-back. I know egyptian police used a special version of the R80 with low compression base shims, but egypt doesn't use arabic script.
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Old 02-02-2013, 08:16 AM   #8
disston
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All of the bikes at that vintage had shims on the base of the cylinder. It was even called a gasket. There are other ones that are thicker but you need to measure the one you have to see if it is truly a decompression shim or the standard gasket. Sorry I don't remember how thick the thinnest one is.
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