The 250R is what all other sport quads strive to be. No other quad to date has had better geometry, Honda keeps it simple. Doesn't get any easier than keeping a 2 stroke running good. There is nothing to fail,It is a piston, rings, and a carb. Honda's 2 strokes are extremely reliable. I have had over 3,000 miles on a single ring/piston set. If you do your oil changes and run the correct mixture they are amazingly reliable. Used parts are readily available so you don't have to buy everything brand new.