I recently purchased a used 2002 426. It appears to be in great shape. I think it was well cared for. However, within a couple hours of riding, the oil level will drop from the top of the dipstick to the bottom. I wonder if it wasn't properly broken in and the rings aren't seated? I find it to have lots of power, although I don't have anything to compare it to. I have checked the valves and they are in spec. So I was thinking probably later in the summer when the valves need adjusting I could check the rings. Does anyone have any other ideas or could I do dammage consuming this amout of oil? Could it be something other than the rings with this amount of oil. It's not like I'm leaving a trail of smog either. It seems to smoke at start up and then not so much but the oil is gone. It's hard to know what's happening when I'm riding. Thanks- and this is a great site!