Are the forks stock? If they are, you may need more than springs if you plan on jumping! Stock valving is a real bummer on these bikes!
I had a '92 and a '93 CR250, I weighed 140, and the forks were way too soft stock, with the clickers all the way in! I ended up sending the forks away for a re-valve on both bikes. Jeremy could provide more details, but it almost seemed like there wasn't enough of an anti-bottoming system.
Anyway, one set was sent to Pro Circuit and the other set to Jackson Performance, and they both worked way better after the re-valve.
I then switched to Suzukis because I wanted a bike with good stock suspension. Only trouble was, then I ended up sending the motor off to get ported and bored. AND I eventually re-valved the suzuki suspension as well.
To sum up, the Suzukis were ok, but the grass really wasn't greener and now I'm back on a CR250 and I love it!