Jeremy,
As I think you know the 2003 Service Honda used 2002 frame and suspension components.
Stock it comes with .44's and 4.8 or 4.9 rear shock. Both felt way soft to me.
I weigh 185lb and 225 with gear (tools, camelbk, etc) when riding enduros/qualifiers and Hare Scrambles. I'm less weight when running the Hare Scrambles...maybe 8lbs. But, add into the equation a 3 gallon tank plus 7lbs of the 500 engine over the 250.
I run a reasonably aggressive pace in the A class in both Hare Scrambles enduro/qualifiers. The guy I bought the bike from says he has your valving so I think I need your opinion on spring rates front and rear.