As per my other thread, I changed the oil and filter last night. After dropping the oil and filter, I put the new filter in and did up the drain bolts. Now the bike was on the centre stand at the time, and after one 1 ltr bottle, I could see the oil coming up on the oil sight glass. Popped 3/4's of the next 1 ltr bottle. Then as the manual says, I started the bike up to get the oil circulating before topping up again. I also took the bike off the centre stand and left it on the side stand, so that it was level. Now I couldn't see any oil in the sight. Pretty much put all of the next bottle, so a touch under 2 ltrs went in. Manual says 1.9 ltrs. Started the bike again, and still cant' see any pil in the sight. Bike starts fine, no oil light and sounds ok. I put the old oil in the empty containers, and it was pretty much 2 ltrs, black as, but around 2 ltrs. So where has my oil gone? What is the best and most accurate way to check the oil?