Yamaha XT500The Yamaha XT500 first proved its reliability by clinching victory in the inaugural cross-desert Paris-Dakar Rally three years after the bike was introduced in 1976. Powered by a 499cc (30.5 cu-in) air-cooled single-cylinder engine, the XT500's mechanical simplicity is a key aspect of its reliability. Its engine, shared with the SR500 street bike and TT500 off-roader, features a single overhead cam and two valves, delivering power through a 5-speed gearbox and chain drive to the rear wheel. This was a bike competing in some of the most difficult endurance races in the world, so the XT500 came with a frame built for resilience and a design that performs well both on and off-road.Reliability isn't just a feature for the XT500 either; it's an intrinsic quality. The bike's straightforward, no-frills design means that when issues do arise, they're generally manageable. Its well-built construction, generous ground clearance, and protective bash plate mean it can handle rough terrain with few problems. The XT500 is known to be very reliable, but the motorcycle isn't without its quirks. The absence of an electric start means riders need a bit of muscle to get going — great news for purists, but not so much for those who prefer more convenience. Also, while it's great on roads and dirt paths, its heft and power delivery can make it a handful in more technical off-road scenarios.Yamaha XS1100Back in the late '70s and early '80s, there was huge competition among Japanese motorcycle brands trying to outdo each other in power. Yamaha was right in the middle of this with a special bike called the XS1100 — also known as "the Eleven" for its 11-second quarter mile. This bike was all about going fast and being comfortable on long rides.The Eleven's air-cooled, four-stroke transverse four-cylinder engine comes as a 1101cc (67.2 cu-in) unit. It also had transistor-controlled ignition, wet sump lubrication, and a HY-VO chain and gear for primary reduction. All this ultimately translated to 95 hp at 8500 rpm, pushing the bike to a top speed of 126 mph. The shaft drive, in particular, is a big factor in the bike's reliability and reduced maintenance.The XS1100's reputation for reliability also comes from the fact that it won some pretty intense endurance competitions like the Castrol Six Hours. That being said, the motorcycle is not without its quirks. The bike's hefty build can affect maneuverability and handling, especially at high speeds. Another known issue with the XS1100 involves the second gear, which can jump out due to excessive torque application — this says something about the bike's potent engine but is also a big point of caution for owners since the only option is to visit a mechanic, disassemble parts of the engine to reach the transmission, and get it fixed.
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