Vintage BMW Motorcycle Owners

Jon Miller is talking about the copper threads on my R51/3. My mistake not to update the thread in the part that I would ask the machinist about the thermal expansion rates of copper versus aluminum . He said it wont be a problem at all, which is so far true, the bike is a rider and I use it almost ...

As for transmission oil, consider the following.

http://www.beemergarage.com/documents/254.pdf
http://www.beemergarage.com/documents/233.pdf

I use zddp additive to the 40 monograde mineral engine oil I put in the engine. Its wuite cheap and easy to find on ebay. I prefer to change the oil more often than recomended since I dont trust the so called oil filter attached to the suction of the oil pump.
Cheers!

found these on the net. Clever convertion to solve your problem.

here's what I have found for you, though it is not for your R25/3 but for BMW R26 / R27. It is written in four different languages , also in English. Let me see if I can find out some more stuff, R25/3 is a very common vintage motyorcycle here in Greece. schrader7032 suggested the right oil for your...

it helps if the headlight is on a table and not on the bike. See mine during the final stages of the restoration. Turn it upside down and use a tool (i dont know the English word for it) as the one on the left of the headlight to keep the mechanism with the spring pressed and apply the board. Use a ...

Stelios - I think the later bikes had a change to the front engine area...you show the earlier version or a "homemade" version. I have pictures at home of my R69S during teardown which shows (IIRC) three gears in the timing chest...the top one was the cam, the middle one was the crank, and...

is it a tachometer or an rpm meter?

http://en.wikipedia.org/wiki/Tachometer
Good chance for me to improove my English!

check these fotos of an R50 (I think) with one installed. Seems it gets powerd by the magneto rotor (?).

http://brooksmotorworks.com/restorations

is it a tachometer or an rpm meter? As far as I know, tachometers are mounted on the gear box.

http://vintagebmw.org/v7/node/6903

also : http://classicdepartment.com/tiendas/pr ... ts_id=1813