My friend and I jut picked up our 06 250F's today, noticed they have pretty bad partial throttle response. I noticed the posts on here about people all switching to the 40 Leak Jet to cure some of the bog issues, I believe the stock LJ on the 2006 is a #80 and that seems like a massive jump to go that lean considering they do not even list it in the manual (only down to a 55). The bike seems to run well otherwise through the gears, right off idle and very small partial throttle opening while riding feels sluggish. Would like to hear what other people are running jetting wise in these temps at sea level. Thanks, Mike.