I have an '07 XR650L with 590 miles. I broke it in according to the "Motoman Technique". I went for a 100 mile ride today and when I got back I checked the oil after the bike was completely cool and... NO OIL! Not even a drop on the dipstick. I have an oil temp. dipstick and never went over 200 degrees today. I have changed the oil once already and was very careful with everything, I added the right amount of oil (I used Mobil 1 Synthetic Motorcycle Oil) and used the right filter. There are absolutely no exterior leaks. I have noticed over the last couple days that there is some black residue in the end of the tailpipe. This leads me to my questions: Should I check the oil when the bike is warm? If so, where should the level be when it is cool? Does the black residue at the tailpipe mean that oil is slipping past the rings and burning? Or is the residue normal? Could the oil I used just be burning up? The oil I used met all the criteria that the owner's manual specified. Sorry to ramble. Thanks in advance. Oh, and as a sidenote, I have the smog block off kit installed and a UNI air filter. This may have nothing to do with the problem, but maybe some dirt got in and ruined the rings/cylinder walls? The air filter is oiled correctly, and the smog kit was done right. I did not use any gasket material on the block off plates.