A time lapse video I shot with my phone. Thought you'd folk would enjoy.
Friend's unheated garage, about 28 degrees, up here in Vermont. I posted a rebuild thread of my '72 R50/5 here on the forum last winter.
It seems I failed to seat the rear main seal good and flush so it was leaky a little bit in the rear. When it's too cold to ride you might as well spin wrenches.
Let me know what you think.