I have them on my 2003 RM250 and love them. There is a definite differance on the bike, it is much snappier and revs harder. I bought mine off of EBay for a great price brand new. Definitly a mod worth doing.
I am positive each bike is differant, some are easier than others. On the RM you simply take out the old reed box and replace it with the new V Force unit. Extremely easy on the Suzuki...... I do not belive you can simply use the V Force reeds on your existing unit.