I just installed this kit on my 03 cr250 . I am running a fatty pipe,
v-force reeds and an MXBonz exaust extension. I ride from 2500-
8000 ft.
The first step did not work well for my bike, but the 2nd step
cleaned up the entire range.
I noticed on my first long ride that I am getting a knock from the
engine, so I am assuming it is running too lean or my previous
jetting masked the need for higher octane fuel . The strange thing
is that I only notice the knock at mid range, I will try moving the clip down 1 notch.
any input from anyone more savvy at jetting than me (that would be most everyone) would be helpfull.