Vintage BMW Motorcycle Owners

You should fill one side (doesn't matter which) with motor oil until it overflows, every 1200 miles / 2000 km or so. I notice you have the front cover off. There should be a cotton wick in that cover that can transfer oil from the oil reservoir down to the gear/bushing on the generator shaft.

dBDawg, is your bike an R12 or a chain driven magneto R11? It looks to me like you have a magneto that is set up for gear drive. Your advance cable is mounted on the left side, not on the right side like pkrpkr's magneto. These magnetos are very modular and can run in either direction, and with a va...

Because of the 6 crankcase mounting bolt holes and the shape of the cutout over the valve area, these are for the side valves in the models from 1937-1942. That includes the R71, R61 and R6. But only the R6 https://vintagebmw.org/model-lookup/?shownode=6337 and R61 https://vintagebmw.org/model-looku...

It's unlikely to be a copy. If your customer had an R71, then you would be right to be worried about a copy. With an R12, BMW made a ton of them, but they were for the war effort (there are prewar civilian bikes, but they're a small minority). The bikes went through the meat grinder of the war on th...

My machinist ordered them and matched a new bore to them. I actually have a second set of cylinders bored exactly the same, so I can swap them with new pistons if I ever need to. The bore is well over the original 63mm, but I've put about 10k miles on them and had no troubles. I was signed up to go ...

That's beautiful, Lee!

I've had pistons made for my R52, that I've ridden 3 times in the Cannonball. I got them from JE Pistons:
https://www.jepistons.com

I had to buy them in a set of 4, so I have a couple spares.

We have had a complaint from the copyright owner, and I have removed the scans uploaded here from the copyrighted book. The club cannot be complicit in allowing copyrighted material to remain on the site, once we become aware of it.

I decided to service the throttle, it was no longer returning to idle. I´m sure there is a better way of doing this, you must always take your bike to a professional for any repairs. I have hand guards, this need to come out. https://farm2.staticflickr.com/1818/43998435111_c1347e635b.jpg https://far...

A recent post by acerynes shows his beautifully restored R69s - wow is all I can say about it. So I went on to acerynes site and he shows the bike as he first got it - so close to a full basket case - pretty daunting to say the least. There I was thinking how much work will I do on my restoration an...

Hello Having fully reconditioned my bmw r68 my bike will not starting,it did on the first kick one cylinder worked left side heat up quite a lot, right cylinder did not start up.ran for about 40 seconds and stalled didn't start again until the next day again same problem.engine air breather in front...