That's a good question. I didn't weigh the forks before install. I would guess that they weigh less, but they are 12 years old, rebuilt or not, I doubt they are as light as a set of forks from a more recent gsx-r.
I have been waiting for a free weekend to take the bike to a truck scale. The nearest public scale is about 40 miles away, and I just have not been able to get away with the remodels on the house every weekend.
I'll post here as soon as I have that data.