+1 to Kirkn's reply..I've got an 83 xv500 Virago that didn't run when I got it. A good carb clean and cleaning all the electrical contacts got it on the road, swapping out the burnt starter with my parts bike, and changing the worn out fuse block with a new blade type are the only things I've had to repair. Change the oil regularly and keep gas in it, I bought a new battery, front brake pads, plugs, and put a rear tire on it, but thats about it, runs great, I ride almost daily, try to do a 75-100 mile ride weekly, did a 1700 mile trip on it last summer. Definitely +1 on a twin (or more), I bought another xv500 recently that I found out (too late) it has a hole in the piston. I can start it, ride it around, runs pretty danged good for only running on one cylinder, it'd definitely have gotten me home if it had happened to me on the road. 4s can be reliable too, maybe a little more attention needs to be paid to "the complexity of it all" but I haven't had any real issues with my 73 cb750 either, which also didn't run when I got it. It was actually seized with rust, but runs well enough I haven't felt the need to pull it apart yet. Swapped in a Dyna ignition so I don't have to mess with points, battery, plugs, oil, headlight bulb, front and two rear tires so far(2yrs)..but those are routine maintenance, throttle cables, speedo and tach cables, chain and front sprocket,and rear wheel bearings might not be routine, but ya gotta expect those eventually too during a 35+ yr lifespan. On the other hand, NOTHING is 100% reliable, not even a new Cadillac off the showroom floor....mechanical devices are inevitably subject to failure.