I am new to the German bikes. I don’t have any literature on these. I am now restoring a BMW R26, 1960 model, with serial No. 366198. I want to set the ignition timing correctly. What are the markings I see (through the window opening) on the flywheel and what do they indicate?
Thanks
Janardhana Rao.
Markings on the fly wheel of BMW R26
Re: Markings on the fly wheel of BMW R26
Hello again Janardhana,
It really is important you acquire a copy of the BMW Workshop Manual - contact Mark Huggett.
The three maks you see are: "OT" indicates Top Dead Centre,beneath that "S" is to set the static timing (points just opening), and under that "F", fully advance timing, best checked with a strobe light while the engine is running. The advance is controlled by the two bob-weight springs on the advance/retard unit on the nose of the crankshaft.
Gerry
It really is important you acquire a copy of the BMW Workshop Manual - contact Mark Huggett.
The three maks you see are: "OT" indicates Top Dead Centre,beneath that "S" is to set the static timing (points just opening), and under that "F", fully advance timing, best checked with a strobe light while the engine is running. The advance is controlled by the two bob-weight springs on the advance/retard unit on the nose of the crankshaft.
Gerry
Re: Markings on the fly wheel of BMW R26
Hello Gerry,
Before posing my query to the forum, I brought the piston of my R 26 to TDC observing its position through the spark plug hole and found the marking on the fly wheel tallying with a mark that looked like “01”. Because it was physically tallying I presumed it as TDC. I now know it as “OT”. Then I guessed a timing advance of 4 mm before the TDC in compression stroke for static ignition and that position tallied with “S”. I fixed the static timing at that point. Later I checked with a strobe whether the centrifugal timing advance is working and found it working. Probably I haven’t revved the engine to be able to notice “F” or to be honest I never looked for that point as I haven’t expected it. Now I know my guess and presumptions are right. Thank you very much for the information.
I posed another question to know how to get at the neutral switch in the gear box as the neutral indicator is mal functioning. I will be grateful if you can through some light on this.
I have already ordered for a BMW Workshop Manual on amazon.com and it is expected any time.
Thanking you once again,
Janardhana Rao.
Before posing my query to the forum, I brought the piston of my R 26 to TDC observing its position through the spark plug hole and found the marking on the fly wheel tallying with a mark that looked like “01”. Because it was physically tallying I presumed it as TDC. I now know it as “OT”. Then I guessed a timing advance of 4 mm before the TDC in compression stroke for static ignition and that position tallied with “S”. I fixed the static timing at that point. Later I checked with a strobe whether the centrifugal timing advance is working and found it working. Probably I haven’t revved the engine to be able to notice “F” or to be honest I never looked for that point as I haven’t expected it. Now I know my guess and presumptions are right. Thank you very much for the information.
I posed another question to know how to get at the neutral switch in the gear box as the neutral indicator is mal functioning. I will be grateful if you can through some light on this.
I have already ordered for a BMW Workshop Manual on amazon.com and it is expected any time.
Thanking you once again,
Janardhana Rao.