I have an 06WR450. This is my first bike and I've only had it for a couple months. I'm mechanically inclined but at the beginner levels of dirt bike knowledge. So I was told that an 05 YZ exhaust cam would be nice upgrade for my bike along with disabling the ACV valve. The problem is I'm not quite sure I understand the benefits. I was wondering if some of the more knowledgeable members could help fill me in. The bike has ECV removed , YZ throttle stop , JD jet kit , stock exhaust mod. On the way is FMF Powercore4 slip on and powerbomb header , Powershot Ap cover and Powernow. Last I'm also going to try the RedBeard mod.