I've got an "03 MXZ 700 ZX chassis and an '07 MXZ 800 REV Renegade X, both with Boyesen Rage Cages. The main reason I went Boyesen is Doo's issues with the rubber carb boots rippin' and burnin motors. I can't really say that I noticed much increase in performance, but a lot less vibration in the carbs while sled was running though. Did drop one size on the mains on the 700, but went back to the stock size. Would I recommend..... yes, simply for the peace of mind that ALL rubber especially where vibration and fuel is involved will eventually dry out, crack, and cause a lean condition.
