I've heard a number of disturbing reports of people not servicing their bikes even to the extent of never servicing it. It seems to run rampant through the 250 riders although I have heard of one or two cases with owners of bigger capacity bikes. And this does not mean replacing worn parts eg chain and sprockets. The worst part is that the riders expect their bikes to work 100% of the time and then blame the bike when it breaks down. I have no sympathy for those people if their bike breaks down in a ride. So the question remains, how often do you service your bike?