Annual mileage will vary all over the map. Most sportbikes are probably only ridden 4-5000 miles per year. Depends on where you live. In SoCal, more miles would be expected since the riding season is essentially year-round. I put 16,000 miles on my SV in 2 years and it's still in mint condition with a complete service history. If the bike has been properly maintained and not abused, 15-20,000 miles in 2-3 years isn't a problem. On the other hand, lots of people buy a bike and ride it 2000 miles in a year and a half then decide to sell.