This is how I did it on an 05 and an 06. I do not know if the 2000 RS is the same. If not, the details may not be alike, but the principle should be the same:
- Remove radiator pressure cap
- Release radiator bleed screw
- Release water pump bottom hose
- Drain
Refilling
- Reconnect bottom hose
- Add coolant through radiator filler until full. If the system is filled correctly and fully, there will be coolant visible at the bleed screw and in the filler opening.
- If there is no coolant at the bleed screw, attach a length of tubing to the bleed screw spigot and pour coolant into the bleed screw side of the radiator.
- If needed, top off the system through the filler and reinstall the pressure cap.
- Start the bike and let it run to allow trapped air to be expelled.
- Stop the engine, check for leaks, and refill the radiator as necessary.
- Refit the pressure cap.
- Check the expansion tank level and top off as necessary.
I've done a coolant change on two of these bikes and in both cases got a coolant flow at the bleed screw and did not have to pour coolant into the bleed screw opening.
Since your bike is a 2000, you might want to consider replacing your hoses if they are over three years old.