This is a general overview of how to service or rebuild the carburetor on your 1997-2000 Honda CR250.
The 1997/1998 Honda CR250 model years used the Keihin PJ28L, and the 1999/2000 Honda CR250 model years used the Keihin PWK00.
Related: If you don’t want to bother with a rebuld, you can upgrate to a Lectron!
There are a few carb jetting differences between these carb models, but the biggest difference is the PJ28L had the electronic power jet solenoid option.