Hi all.
Well, I did tap into the top of the timing cover, it's not all kinds of pretty, but works well.
I had to have my bike flatbedded home at the end of riding season last year, I'd kick and kick and kick, with no luck at all, even with coasting and popping the clutch - which would normally work, didn't, that's the reason for the flatbed.
I had read that it might be the tapped gap, or the carb adjustment, so today I checked the gaps, that wasn't the problem, I've always kept up with that so it didn't make any sense that they would be out.
Took the Mikuni's of for a cleaning and found a bunch of dirty engine oil at the very front lower intake of both carbs clogging the vents, gave them both a good spray of gumout, got the bike back together, and two kicks - it fires right up.
Now, back to the breather.
Venting through the timing hole was coating the back of the bike right up to the front of the back fender, AND - the carbs.
After starting the engine and watching the breather tube, I got no splash of oil like I got out the timing hole.
Problem solved.
Now, like I said, it ain't pretty, but it works just fine.