I own a 2003 YZ125, and I'm thinking about wheather I should have a big bore kit installed. I was reading on Eric Gorr's sight, and he explained that the 144 requires maintainance at 5 hrs. for rings, and 10 hrs. for the piston. Is this also true for the 134 kit? I don't race, and I ride just on the weekends, and I have been redoing the top end at 40 hrs. What is the recommended maintainance for the 134? Thank you.