Vintage BMW Motorcycle Owners

Cylinder pictures.

You can see the “R” next to the arrow and word “vorn”

Dan

Thanks,
I figured the "vorn" part and valve cutout issue.
Now trying to understand the "R" stamped.
Assuming its for the "R" series motors, or...

Kurt;
thanks for the help.
Really doesn't make sense to me, but what do I know...

Thanks again.

Dan

Kurt;
Are you saying the offset is designed to be off center from the Cam?

Dan

A 1974 R60/6 engine

Why is the alignment off by so much?

Any ideas???

Dan

Guys; I have a 1974 R/60/6 engine (based upon motor serial #4900216) in my '69 bike. Checked pressure and left side is only producing about 40 PSI. Pulled head and cylinder. Noticed cylinder is stamped (R) with an arrow pointing to front (Vorn). Am I correct that this cylinder should be on the right...

Adjusted the swing arm. did not pull the bearings...yet. That will be done. But more importantly, I now have very low compression in one cylinder. 40 #s. Time to pull her apart. Really too bad. The person I bought the bike from stated it was rebuilt with new rings etc. Don't know issue yet, but will...

Houston, We have a problem.
Was noticing a strange jerky ride with a side car on my '69.
found the swing arm play way too much. Will check it out tomorrow, but may need new bearings.

Thanks for the suggestions.
I'll start checking all items (that I can).

Thanks again,
Dan

Yes. The earls are set to sidecar position.