this may be a stupid question but im curious...bike is an 03 yz250f. rather than splitting the cases just to clean out the bottom end, would i be able to pour gas/diesel in the cases and swish it out and then pour oil in there? and i mean do this process while the cases are together and everything is in there. top end is off thoguh! only botttom end. now there is no particular reason i want to do this,i just want to make the bottom end is "clean" without splitting the cases.