09 250sx jetting suggestions

[2StrkCldSmk]

Hello all.

I was wondering if anyone had any suggestions for jetting an 09 250sx. The stock jetting is for a 1:60 Mixing Ratio, 1000-2500ft elevation @ 60-80 degrees F (42 Idle Jet, 158 Main, N1EI needle in Pos 3).
I noticed that my bike begins to get sluggish and starts to load up a bit when the temperature rises up above the mid 70's (degrees F). Most of the tracks in my area are at or below 1000ft and the manual suggests a 42 Idle Jet, 160 Main, N1EH needle in Pos 3 for temperatures from 60-80 degrees F. The manual is suggesting I run even richer, won't this make things even worse?

The bike has very low hours and runs great in colder (40-60 degrees F) temperatures.

Thanks in advance for any suggestions.

[jwheels]

Hi mate,
I bought a new 2010 end of last year to race this season on, Had dramas with jetting too... Im in the same elavation and temp bracket as you... I run 40:1 oil ratio though, 158 main 40 pilot N1E1 needle 3rd clip. My bikes been great on these settings, definetly crisper, and doesnt show any signs of being lean... the 40 pilot is the go!

Hope this helps.....

[jwheels]

Thought i might ad...
I stuck a pro circuit muffler on it, ended up with same settings as above but with air screw in 1/2 turn from std.