A guy at work bought a 550 Honda new and rode it to work every day, rain or shine. If it snowed he used his feet as outriggers. Anyway, he mentioned he was going to change the oil over the weekend and I asked if he was going to change the filter too. Puzzled look. "It has a filter?" True story. Bike had 40,000+ miles on it at the time. A year or so later I did a complete tune up for him and took it for a test ride. 55,000 miles and it still ran fine. Next time I see him I'll have to ask him what finally killed the thing.