12-21-2015, 01:13 PM
The theory of changing while warm supposes that any sediments will be put into suspension and easily evacuated when drained. Conversely, draining when cold theorizes all scrud has had time to work it's way down into the crankcase and assumes it too will drain when the plug is pulled. In my experience, there will be no dirt, no debris, no particulate, no scrud to be found in any well maintained modern motorcycle engine. Why? Because of the oil filter.
Pull an oil pan or two and check for yourself. Or, if you're not up to going to that much effort, next oil change, cut open your oil filter and post up some pics of your findings. That said, if one is still concerned about sediment being left in the pan, after draining, run about a half quart of clean oil through and let it drain thoroughly before buttoning the pan back up. The theory being, a little extra rinse to clean out the pan can't hurt
Pull an oil pan or two and check for yourself. Or, if you're not up to going to that much effort, next oil change, cut open your oil filter and post up some pics of your findings. That said, if one is still concerned about sediment being left in the pan, after draining, run about a half quart of clean oil through and let it drain thoroughly before buttoning the pan back up. The theory being, a little extra rinse to clean out the pan can't hurt