I have probably 80 hours on my bike. Today I warmed it up and went riding. After about 2 minutes of riding I heard something unusual and pulled off the track. There was a metallic(?) sound from the top end and no oil flow in the sight glass. I shut it down and brought it home. I drained the oil to verify my level and check for any debris. Only 400 ml came out! Clearly I have been neglecting looking at the oil flow before riding or this wouldn't have happened. :bonk:I don't know how many hours it took to lose 600ml of oil. I haven't noticed any oil in the exhaust nor have I seen any dripping out the valve cover vent. There are no external leaks, so it must be going out the exhaust or the vent while riding. I took out the cams and pulled the head for inspection. The camshaft journals have light scoring, as do the camshaft cap journals. Nothing real rough, but not normal. I'd guess they are scored to the depth of a phonograph/record. The lobes and buckets look great. I don't feel anything unusual in the bearings nor do I see discoloration anywhere. The combustion area and the top of the piston have a lot of carbon on them and it is crusty rather than sooty. The manual does not address damage to the cam caps or journals. How much damage is acceptable to the camshaft journals or caps? Can they be polished or otherwise repaired at a cost less than replacement? Thank you.