I know this is not what you were asking, but I agree with Foxx. If you rebuild it without splitting the cases and checking the bottom end, bearings, and seals, you will be wasting your money. Your bike is 20 years old, and unless the bottom end was redone recently it's most likely both worn out and now rusty. Even if you buy a simple Wrench Rabbit kit and rebuilt it, you would be miles ahead of trying to flush out the bottom end.
If it were mine and I was going to keep it, I would go through it and replace the bearings, seals, and transmission snap rings with OEM parts and the gaskets with OEM or Cometic. I'd also replace the rod and piston with Wossner parts.