ive just done mine mate on my vtr, theres more to it than i thourt because there is no header tank and the fill on the rad is lower than the highest bleed
The propper process is:
get a 2ltr bottle cut it in half and put it on the rad filler, seal it on with some tape so there is no leaks. this acts as a header
undo all the bleeds
1, rad
2, thermo
3, heater matrix pipe
slowly fill the rad, once water flows out of the rad bleed do it up, then keep filling till water goes out of the thermo bleed and do it up, then fill till water comes out of heater bleed and do up.
fill the rad till the plastic bottle is half full then start the engine with the heaters on hot
the water in the bottle will go up then once the thermo opens it will take it, its surprising how many air locks there are.
let it run till the fan comes in and off then turn it off.
Wait for it to cool and take bottle off and replace cap.
You must use a bottle mate because if you dont it leaves no room for exspansion and it will but pressure on the rad.
Hope that helps mate, bit of a process but worth doing properly
Cheers
Adie