I own a 04 sp 500, and I don't do alot of riding. In fact it has been about 3 weeks since I went for a ride. Went on vacation for a week and came home to find a flat front tire. I pumped it up and 3 days later it was flat. I took it in today to get it fixed. I guy told me there was a beed leak with a spot of dirt 4 inches long around the inside of the rim. Told me that it probably came from the factory like that since I only have 95 miles on the tire and there was no other way it could of got in. Thank god it only cost me 6 bucks.