In VERY basic terms:-
- Centre stand and engine cold
- all the side plastics off
- lots of containers underneath and rags close by
- leave the radiator cap on.....save the gush some what
- bottom hose off and allow to drain
- side screws out (between the engine pipes in the Pic)
- bottom hose back on
- remove and drain the res (some ice cubes rattled around in there can help knock the scales of coolant off)
- Cap off and fill with water and run bike for couple of minutes (i go to just the 3rd bar) then allow to cool
- repeat the drain/refill/side plugs until water is clear
- inspect hoses etc and replace side bolt washers
- fill with 50/50 premix....(Be sure it the right stuff) The red Nulon from Supercheap meets the criteria.
- fill radiator to not quiet full, leave cap off and run bike up to temp......few blats on the throttle to allow air
To escape from top of radiator
- top up, cap on.....fill res to level, plastic back on and off for a short ride, re-check res level when cool.
Mark the low/high level indicators with a black marking pen so you can see levels when on the bike with only the small access cover off.
That's as condensed as I can go Peter, but hope it helps you decide weather to do the job yourself or not.....will take you a good few hours.....but with the long life coolant you won't need return for some time.