Vintage BMW Motorcycle Owners

I posted this earlier but the thread went sideways with the closing of Benchmark and I didn’t get a response. In pulling the heads and cylinders to replace pushrod seals, I found the left head cracked. My Indy says he can weld it but can’t guarantee the result because of what potential problems may occur because of the heat from the welding.
Has anyone had success in doing a similar repair or should I look for a replacement head?
Secondly, it appears from the part numbers that the R50/2 and R60/2 use the same head.
Is this correct as it would broaden the search results?
Thanks in advance.

Randy Long
 repaired mine. You might touch base with him @ 610-286-5870

HI, , on one of my old BMW "s I had a crack the same as yours but at the time I did not know....I drove the bike maybe 5,000 miles before I had to take the head off for valve guide replacement and it was then that I saw the crack ...around that same time by coincidence I met up with the previous owner, I mentioned this crack and he told me it was like that with him! So I guess for me I was lucky that nothing happened but it would have been nice to have known .

Have you seen this article? https://w6rec.com/heads-and-butterheads/

First thanks to all for replies. I had seen the Duane Ausherman article some years back but forgot that he mentioned cracked heads. I just remembered the butterheads. I’m still trying to source a left head for an R50/2 or an R60/2. The ones on eBay all have some issues and new ones are around $800. If anyone has one in their stash that they would be willing to part with please PM me. Thanks.