In my september issue of Sport Rider, in the Mail Box section on page 22, a guy wrote in saying he put over 288,000 miles on his 99 Yamaha R1. He says he went through 19 chains, 63 front tires, 70 rear tires, and over $1800 worth of oil. He says he didn't have to change a valve shim until 160,000 miles. He offered to send copies of all the maintainence records to Sport Rider if they wanted. If its true it shows that modern well-built sportbikes have the ability to last just like your car if properly maintained. I know my bud regularly runs his bikes up to 100k miles running strong...and thats with lots and lots of abuse...he's a complete animal on his machinery lol. Kinda makes the oil threads useless, considering 99.99% of us will trade our bikes off wayy before they're even close to worn out, regardless of the type of oil we use And makes those low mileage half-priced used machines even better deals eh?