Hi everyone. I have a very important question. I am going to be buying a full HMF race series exhaust kit, high flow air box, and K&N air filter for my 05' YFZ 450. I am also going to be getting a jet kit for it. I have no clue what size jets I need to get or anything like that. I talked to one of my buddies and he told me to put a post up on here and ask all of you. My elevation is 568 FT. above sea level. My summer temperature can get up to 100 degrees and winter can get down below 0. If anyone knows how I should do the jetting on my bike with the exhaust and filter and everything on there and with the elevation and annual temperatures, please let me know. I greatly appreciate your help. Thanks.