Do you have a hour meter installed, what color is your oil when it comes out? At this rate you'll be changing piston rings every 10ish rides.
I'm willing to bet you only get between 1.5 to 2.5 hours on your bike.
Whoa James, my oil comes out slightly darker than the way I put it in, its like a darker maple sryup. No Hour meter, But I do know I go out 30 minutes at a time and go out 8 times. My piston is doing great! As a matter of fact, I had my bike for over a year and haven't had to even reset the valves. If you don't believe me come on out! I'll give you real life proof!