I just rebuilt the pump from my 96GSX, it was so easy. What made it easy was Dr Honda's pump tools, what use to take like hours took maybe 20mins. In the past I've used sockets, a cut off ratchet handle and it was always guess work. These tools make it easy and take all the guess work out of the job, and the price if right too.
http://www.a-lmotorsports.com/Products/18-bearing-press-tools-2-stroke-all.aspx
Lou
http://www.a-lmotorsports.com/Products/18-bearing-press-tools-2-stroke-all.aspx
Lou