Interesting , thanks Ray. I would not call my primary chaincase oil tight, there is usually a drip at the chain tensioner, but I do not lose a lot of primary oil, with the spring to the outside of the seal oil cannot move from primary to crankcase. I couldnt say what the actual quantities are, I drain the primary every 1,500 miles or so and it looks like the same amount as went in, but blacker on exit.

71 Devimead, John Hill, John Holmes A65 750
56 Norbsa 68 Longstroke A65
Cagiva Raptor 650
MZ TS 250
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