Yamaha, Suzuki, Honda and Kawasaki are among the more reliable motorcycle brands. Conversely, Triumph, Ducati, BMW and Can-Am are among the more repair-prone brands. That's what we found based on the feedback of more than 11,000 subscribers reporting on over 12,300 motorcycles purchased new between 2008 and 2014. The graph shows the percentage of motorcycles from each brand that we predict will need a repair by the fourth year of ownership. Our statistical model estimates failure rates for 4-year-old motorcycles not covered by a service contract and adjusts for mileage driven over a 12-month period. The mean annual mileage is around 3,800 among all motorcycles included in this analysis. Differences of fewer than 10 points between brands are not meaningful. Note that models within a brand may vary, and design or manufacture changes may affect future reliability. Still, choosing a brand with a good repair estimate can improve your odds of getting a reliable motorcycle.