Hi , first of all , i have a canadian WR450F 2004 , ive used it for 4 months , and now that season 2009 is about to start here's what mod i want to do , i just need some help for the jetting , ive read FAQ section but since i dont know the stock main jet and pilot size , i want to be sure to give the right info at my dealer , since the guy dont work with wr450 too often. THE BIKE IS STOCK NOW : here's the mod that will be done please help for pilot and main size please , i dont know anything in that. Air snorkel remove grey wire cut YZ450 pipe to replace the stock one throttle stop (yz size) and the dealer says i should jet the main one and keep the pilot stock , i do 90% of trail riding near sea level in summer condition (25degree) what should i buy or do ? just jet the stock main jet and keep pilot or buy a kit ? please need some help im no pro racer im just looking for the snap in throttle response and better 4th and 5th gear , and i want to do the right setup for the bike.