I am wanting to help a friend set up his suspension on his 450. I understand and am fairly good at setting up suspension on bikes. My friend feels he needs someone to revalve it and set it up, however, I feel that the factory valving should be sufficient and that we will be fine just adjusting it for his riding. I am looking for feedback on whether he really needs revalving or upgrade on his suspension. He is @ 230lbs and is looking to start racing. He is an intermediate rider and is not very aggresive. I have riden the kfx and feel that the suspension is fine, but needs alittle adjusting. However, I am not a racer, but can set up suspension faily well. Thanks for anyones input on this.