I was at the gym reading Cycleworld (I think) and in a previous issue they must have bashed the Suzuki RE-5 rotary motorcycle. One reader responded that his RE-5 has 327,000 miles. I think that's a pretty impressive number and shows the durability of rotaries when they are maintained properly.

 

The N/A rotary was the second longest lasting engine behind the mercedes benz diesel in the 80's. Its obviously an underutilized engine design that has the potential to outshine all other conventional engines if developed properly.