Well - with last weekends 18" of snow, our riding season was delayed a bit. So I decided to put my "Betty" together and change the oil. After draining overnight the down tube screen was pulled and cleaned and I cleaned that flat shelf in the bottom of the tank that is accessible when the screen is removed. This is so easy to do and once you find that spooge in there you will do it more often. After putting the screen back and connecting the oil line I started to put some oil in the frame and noticed I had forgotten to change the filter. So I grabbed the 8mm T handle and whipped off the cover, pulled the old filter, and wiped out the filter pocket. The new oil I had put in the frame was slowly draining out the oil pump and it was turning from a dirty brown to a nice clean gold, (15/50 Mobil One), as the dirty oil drained through the oil line and pump. Now if I had pulled that filter the night before and let it drain this wouldn't have been so dramatic, but there has to be some garbage left in there. This is also the lowest point where garbage would collect and after putting that new oil and filter in this is the first thing your new filter will swallow So - from this day forward, when "Betty's" oil gets changed, the filter/pump cover will be off and a small amount of oil will flush through the oil line and pump before the cover goes back on.