When all is said and done, the way I figure it is, my motorcycle does not burn oil. There is no trace of a smoky haze or a cloud of smoke coming from the exhaust. If the oil level was good last week it will be good today.
There are no signs of an oil leak anywhere on the engine (if one ignores the small accumulation of oil that was thrown off of the rear chain, below the drive sprocket.
When I filled the oil at the last oil change, the oil level was right where it should be.
With no external leaks and no vast clouds of smoke following me down the road, there is no way there can be any significant oil loss so I usually don't worry about it.
Only occasionally, do I look at the oil level sight glass.
If it looks black (from the dirty oil), all is well.
If no oil is visable, I'll start the engine for a moment, shut it off, give it a chance to drain and look at the window again.
It never fails to either show the oil level above the bottom of the glass so, what's to worry about?
I sometimes worry about you people who think the oil level must be measured to the nearest mm. before you can safely start the engine.
I'll bet 98 percent of you haven't checked the oil level in your car for over 2 months.