I have a Canadian 2004 WR450 and I am getting ready to do the free mods. It is my understanding that the Canadian version does not have the grey wire or the airbox baffle. I have a PMB exhaust insert to install and will do the cutouts on the side of the airbox. I ride at 0 to 1000ft of elevation. And have read the jetting database and other threads. For jetting I would like to use: 168 main, needle OBDUQ-4 (stock), 48 pilot (stock), 1.5 turns, 70 starter jet, #40 leak jet I am a bit confused about the starter jet versus pilot air jet. Should I leave my pilot air jet at the stock #80 and change the starter jet from the stock#65 to a #70? The local Yamaha dealer could only confidently say that he could get me the 168 main. He was confused between the starter jet and the pilot air jet. And he could find no reference to the leak jet at all. Can anyone out there give me some help with part numbers? Sorry about yet another jetting question, but I do need some help. This is only my second jetting experience. Thanks.