YZ450FX Lowering Link
We make two Yamaha YZ450FX lowering links & both are based on our YZ450F lowering link (and tweaked for the FX's suspension & 18" tire).
#1) Choose the TRAIL YamaLink if you want to lower the rear about 1.25 inches. Great for lightweight & trail riders or the inseam challenged. Includes grease zerk.
#2) Select the YZ450FX RACE if you're a combination of aggressive + racer + heavier. Lowers rear about HALF the amount of the Trail. Also has a grease zerk.
Whichever one you choose, a YamaLink gives a lower center of gravity resulting in faster corner speed & more plushness over square edge bumps, rocks & roots. The Trail YZ450FX lowering link (NOT the RACE link) may require you to go up in spring rate if you're on the border of needing a heavier spring with the stock suspenion.