verslagen1 wrote on 06/12/12 at 11:42:00:leaning the bike only drains the cam bath and may get the oil caught in the gaskets for the side covers. and does not drain the passage ways, so oil start immediately.
Interesting point, eventually all the oil will get changed anyway even if you leave a few percent in the engine at each service. And as you say, it may prevent temporary oil starvation to some components on startup (slightly dirty oil for a few seconds is preferable to no oil).
bill67 wrote on 06/12/12 at 14:56:33:I would rather have it a little over the top line than under,You know it not going to hurt anything being over the line or they would have the top line lower.I would think it would run a little cooler with more oil.
One time on my beemer I was adding the oil after a service. I got to the point where the oil was at the top line, but I went ahead dumped the last of the quart in just to empty the bottle. HUGE mistake! When they say to top of the line on a beemer, they mean it, because on my next trip it blew oil out the breather all over the motor. The beemer used almost 5 quarts with filter, so I thought a little over the mark wouldn't be that significant - wrong!