1600 miles and counting (slowly) on my first bike(Kings). 400 and climbing fast on my newest(Dax).
I am diligent about my oil mixtures, Check my engines nuts and studs before every ride. oh yeah I rarely ride anyway but Wide Open Throttle! I also kill my motor with the choke to detect air leaks ASAP.
No rebuilds for me yet. Only the usual exhaust gasket issue, Bent chains replaced, and 1 throttle cable replaced. The 1600 mile motor seems to have lost a MPH or three, but will still keep up with my new bike