Thanks for the information, I though I remembered Scott posting something about using the MV coolpower.

During this journey, I discovered on the 170 there's a path from the nipple on the crankcase that supplies the vacuum signal to the regulator, through the cam area, through the rear bearing, and out through the crank pin when the conrod is in the correct position. I'm quietly wondering if that's a good place to inject a cc or two of oil and give it a quick prod with the starter if I'm not going to run it for a few months?

I haven't had any bearing corrosion issues in the past when I've been using it regularity but these days it has tended to sit around a lot.

I might give the MV coolpower a shot at 15% for a while..