Adjusting fuel/air mixture

my bike has all the syptoms of No.4 (Rich) on here and so i'm thinking of doing the adjustment on Catppopman's page. How difficult is it to do honestly and what sort of timescale shoudl it take. i have the tools to do it readily available. Just don't want to get part way through and realise it's harder than it looks.

Also is there anything else that would have to be done following this. I have stock airfilter and a twin outlet Blueflame at the mo but if i can do this competantly then i'll buy the filter if its needed aswell with the money i save from adjusting fuel myself....if that makes sense .

Cheers

EDIT: can a Mod move this to Tuning & Tweaking please....i'm not awake yet