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Old 01-07-2013, 02:47 AM   #18
RGregor
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Joined: Oct 2007
Location: Bavaria
Oddometer: 437
Quote:
Originally Posted by supershaft View Post
Ambiguity? Not from BMW specs. There is all the BS and there is the specs. That isn't ambiguity.
I've been told once to refrain myself from cam discussions but at least I'll share the information I have.
The BMW service bulletin that is floating around here in Germany is from July 1980 and it says:

The position of the key slot of the cam is changed by three degrees.
The timing numbers show an advance of six degrees with respect to the crank.

Nockenwelle 0°
Nockenwelle 3°
Einlaß öffnet 32° vOT
Einlaß öffnet 38° vOT
Einlaß schließt 52° nUT
Einlaß schließt 46° nUT
Auslaß öffent 52° vUT
Auslaß öffnet 58° vUT
Auslaß schließt 32° nOT
Auslaß schließt 26° nOT


Are these specs correct?
These are the same numbers shown here:
http://bmwmotorcycletech.info/cams.htm

Anyone ever checked them?
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