I can honestly say that with the exception of one, I have never had an unreliable bike. And, I must say that the unreliable one - my first one, a Yamaha 350 R5C, was only unreliable because I was young, dumb, and eager to tinker. Even still, as long as I kept an ample supply of plugs and points, it never really let me down for long. When I sold it 9 years later, covered with lumps, bumps, nicks, dings, and dents. she sold for $100 less than I paid. So, even she wasn't such a bad bike after all. Since those days I've kept to a minimum on mods and tinkering and stayed pretty regular with the maintenance schedules with those that followed and (knock on wood) all have been a breeze to own and ride.