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DaBlue1 · May 14th, 2013, 02:17 PM

Are you in Charleston, WV (mountains) or Charleston, SC (sea level)?
How many turns out on the idle mixture screws did you go?
Can you adjust the idle speed with the idle adjustment knob at all?
What type of exhaust do you have?

Idle speed should be set when the bike is completely warmed at 1300 +/- 50 rpms.
A 40 pilot jet is unnecessary. You should be able to get it to idle fine with the stock 38. Have a good read and look at the link below. Should offer you some good insight for your jetting needs

Motorcycle Carburetor Theory 101
http://www.motorcyclecarbs.com/carbs101.pdf

May 14th, 2013, 02:17 PM	#9
DaBlue1 Long Time Rider Name: Blue Location: Charlotte, NC Join Date: Sep 2010 Motorcycle(s): 2009 Kawasaki Ninja 250R Posts: A lot.	Are you in Charleston, WV (mountains) or Charleston, SC (sea level)? How many turns out on the idle mixture screws did you go? Can you adjust the idle speed with the idle adjustment knob at all? What type of exhaust do you have? Idle speed should be set when the bike is completely warmed at 1300 +/- 50 rpms. A 40 pilot jet is unnecessary. You should be able to get it to idle fine with the stock 38. Have a good read and look at the link below. Should offer you some good insight for your jetting needs Motorcycle Carburetor Theory 101 http://www.motorcyclecarbs.com/carbs101.pdf