Need thoughts from the collective wisdom... First things first - 1994 R100 GSPD, ~ 45k miles on it, original top end (no piston, ring, cylinder work done to date). Returning from a ~500 mile round trip outing a while ago noticed a lot of oil from the left side. Enough that it was making my shifter lever slick and the toe of my boot slick enough I had to be careful putting my foot down or it would slip out. When I got home, took a look and there was oil on the carb, shifter, and top/bottom of the cylinder. Top of left carb Cylinder Intake Carb Air Intake Cylinder bottom (with filthy pushrod tubes) So I cleaned things up some and, prior to my next ride little while later I dusted with talcum Again, lots of oil on carb, boot, and shifter. When I got back - could tell that, while might be a slight leakage at the pushrods - it was not the cause of all the oil. Looks to be from the head gasket area which is being misted/slung onto the carbs, shifter, and my boot toe. As you'll see from the pics - the only other thing would be the cylinder intake from the carb? (would a lot of oil leakage from that be possible?). Cylinder top after second ride Cylinder intake Here's a shot of the bottom after being parked little bit (sorry bit blurry) And in anticipation (and because I got them for Christmas) - I did a compression test and leakdown test. Carbs were removed and I ran the bike to get the temp up but it probably cooled little while I got the carbs off. Compression test of right (non-leaking) cylinder Compression of left (leaking cylinder). So looks to be about ~10 psi less on the left. Leak down test on the left cylinder So looks to be about 4psi (4%) loss. Felt around and felt a little air from the exhaust valve and when I opened the oil filler/dipstick could "hear" air in the sump but didn't feel any coming out the filler. So - thoughts? Is the oil leak coming from the head gasket or could it be a bad seal at the cylinder intake? Is the compression and leak down test bad enough to indicate bad rings or? Thanks for all the help I know I'm sure to get. Advance warning - because I know folks like instant gratification - my ability to really get to work on the bike is often sporadic depending on many variables and the bike is in a shed/shop up the hill that is my back yard (no garage) that requires me to run an extension cord for light/power so it's not a quick hop out to the garage to check/confirm something.