Recently a freind of mine that rides a KTM posted the following message on a local harescramble racing pit board. Im posting his message here to get your guys take on this. He was talking about a WR250F but still his comment still applies to us too. I will not give his name to protect his identity in case you guys think he is wrong. ----------------------------------------------------- As far as the YZ timing issue I'll set you straight right now The ONLY reason yamaha retarded the exhaust cam is to cut down noise emmisions it DOES NOT make the motor pull harder down low this is a myth. Any one who has spent any time fooling with camshaft timing will tell you that retarding timing increases top-end power and advancing timing has the opposite effect. In the case of the yamahas all it does is decrease power across the board! The reason people feel it has more lowend is they are able to use a greater amount of throttle in slick conditions without spinning the tire (which means the motor is a DOG) this may be of some use on a big bore but my "opinion" is that you can not increase the amount of power coming out of a 250f enough. The more power the better I have ridden several 250f's and have always came away amazed at there ability to pull my lard butt at low RPM's even up steep hills so increasing your bikes power will not have an adverse affect. It only takes about an hour to change it and it requires no parts so it is easy to change it back if you don't like it for some odd reason. I promise it will pull better at all times. I have been trying to convince Darrin to try this for a long time but he is to scared and he thinks his bike may make to much power and for some reason he keeps forgetting that the throttle turns both ways! Just do it. The fact that you are hanging out in a race forum tells me it is the right thing for you. Just don't be dissapointed when I fly by on old Bessie no amount of work will make that thing a KTM!