Vintage BMW Motorcycle Owners

After much thought, I am likely going to use it for a bit and thewn put a liner in. Vech told me about Ospho and if I get surface rust I can always use that. I think I am going to do POR-15. I have heard great things and it's silver, which was the pre-war color (or so I have been told). Thanks all!!!

Not to hijack the thread, but I have a “new to me R12” and after I am done cleaning the tank I am considering what to do. I am seriously considering leaving it without a liner and just making sure I keep the fuel topped off to Minimize any rust potential. I have read varying thoughts on lining versu...

Very nice!!!!! Please send more pictures and there is a great group of people here on the forum to help!

Paul,

Bing agency in KS does a really good job with that and I would not trust any any other fix than what he does.

It’s winter, I would send it to him to fix.

Best,

James

Welcome!!! Please share a picture of your motorcycle!

It was hard to see your images. I am on an iPhone. You need to mount the final drive in the Motul and measure the distance between the two flanges. The proper distance is in the Barrington manual for plungers. You also need to know the thickness of the hardy disc you purchase. There are several thic...

Don't the prewar plungers... and the R51/2... have snap rings? Just looked at the parts book for the prewar bikes, and they definitely have snap rings. I think the R51/2 is the same thing. The "/3" bikes have staked crosses. My R 51/2 did have a staked cross and I am quite certain it was ...

One last pint of advice. Don’t overtighten the flanges. Not only will the flanges warp, but it does not let the metal walk or grow as it heats up. They warp because they don’t have room to move. Use a NEW wavy washer to stop the nut from backing off, tighten until the wavy washer is compressed and j...

I also just noticed you have snap rings on yours. I have never seen that on an original driveshaft. Anyone correct me if I am wrong, but mine are all staked. Yours have been upgraded. Not bad, just not the original ones. I would question if the length is incorrect and might be putting undue pressure...

I also just measured some u-joints I have here and they indeed measure 19mm x 48mm. I believe this is what is in my R 51/2 but I did not change my u-joint as it was fine. I suggest you try to get your current one to run straight and if it’s still smooth put it back. I do not think the u-joint is you...