Headset Reducer

Hey, I may be buying some 2006 marzocchi 888vf2 for my diamondabck xts moto and have been told i will need a headset reducer. I have no idea about these, what size i will need etc could anyone look at my bike spec on the net and the forks and maybe recomend a reducer that will do the job.
Thanks
Thanks
Do it if you dare
Leaping from the sky
Hurling through the air
Exhilarating high
See the earth below
Soon to make a crater
Leaping from the sky
Hurling through the air
Exhilarating high
See the earth below
Soon to make a crater
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and i hope they are 170mm forks.
Parktools :?:SheldonBrown
Leaping from the sky
Hurling through the air
Exhilarating high
See the earth below
Soon to make a crater
Parktools :?:SheldonBrown
Leaping from the sky
Hurling through the air
Exhilarating high
See the earth below
Soon to make a crater
Parktools :?:SheldonBrown
Actually i might just leave it how it is because im not having any problems with it so might just keep the money for any repairs or parts i may need in the upcoming months.
Thanks very much for the help tho !!!!
Leaping from the sky
Hurling through the air
Exhilarating high
See the earth below
Soon to make a crater