Okay, so I'm picking up my new bike tomorrow ('09 YZ450F). First dirt bike since my 1994 KX250 (before I was married!). Would like to get some input on swapping out my fork and shock springs. Race Tech tools says .50 front/5.8 rear (there's going to be 240 lbs of beef on this bike). Q1: Best place to buy the springs? Race Tech shows a couple of specialty tools are required for the change out. Q2: Absolutely necessary? Q3: What other materials are going to be necessary? New seals? Any input would be appreciated. Want to get the stuff ordered. Thanks.