Getting ready to change my shock oil on my 2009 yz450. I previously had a yz250 and had installed race tech gold valves front and back and changed my own fluids. I had race tech's chart for shock pressure so I knew where to set it for that bike, but on the 450 I'm a little lost. Owners manual doesn't specify a psi. I'm guessing around 140-150 psi? And yes I have an air compressor that goes that high. Any info is appreciated.