06 yamaha wr450 i weigh 175 and the spring rates are good enough for me...per Racetech recommendations. when applying the front brake the forks dive, basically close to bottoming out. will changing the shim stack and heavier oil affect this? my race sag(75mm) is about a whole inch too much. i was able to set the race sag on the rear shock, just not sure how to do the forks... anyone?