I have a WR450f 2005. I´m 105kg/230pounds and I need stiffer springs. If I go to Raceteck.com and use the spring rate calculator it say´s that the standard springs for the shock are 5.3kg/nm. and they reccomend 6.0 for my weight. I called the Yamaha dealer here in Iceland it he said that the standard spring rate for 2005 WR is 4.8 kg/nm. Does anyone know who is correct ?