I have spacers on mine and I love them. It corners much better and feels more stable. Many people are against them saying they put too much stress on the studs and related wheel componets. I have run them hard in the sand and the woods for 400 miles with no problems and I check them often.
'09 XTZ 1000, PDS four seat cage, Twisted Stitch seats, Crow belts, 2.5" wheel spacers, King adjustable shocks, Twisted Stitch cage nets, Looney Tuned dual exhaust and programmer, custom intake, Prestige tie rods, AIRDAM stage 5+ clutch, Dynamat.