I've searched and read and still have a question. I just bought a <10 hour like new 07 WR450. I only rode the bike once in my neighborhood and could tell the jetting was all wrong for 6000 feet and 45 degrees. The bike was supposedly jetted for sea level (still had stock needle) since it came from CA. Anyway I've got the bike apart to grease the linkage, swingarm and head bearings. I also bought the GYTR AIS removal kit as well as an 07 YZ std needle and have taken all the garbage off. Since this carb is so difficult to get to should I just put a #40 leak jet in now while it's all apart or just leave it stock and find out later if I have a bog? I haven't read anything negative about using a #40. I would think know one can know 100% for sure what I should do, I'm just looking for opinions whether I should start with the stock leak jet or with the #40. Any advice would be appreciated, thanks.