I have a 1974 CB200. In order to properly change the oil and clean the filter you have to remove the exhaust, kick starter and entire motor side cover. This seems ridiculous. The 350 and many of the other CB bikes all have oil filter covers on the main side cover. They can be removed with 3 simple bolts to get to the oil filter for cleaning. I'm considering picking up a used cb350 oil filter cover and machining a hole in the side of my main cover that is right in line with the filter. It's possible that the 350 cover is to large and in that case I would make a cover from scratch out of aluminum and cut my own gaskets for it. Anyone ever done this? Sure would make oil changes easy.