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HELP Carb set up NEW KDX200
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Posted by: POHAKU---------------------
Sorry guys if this is "rookie" and redundant. Can you help a Rookie Hawaiian make this simple, and somewhat turn key for me??
I have an 2002 KDX200 just put a FMFpipe, Sclicer,and Boysen reeds. I trail ride, 2-4 gear stuff; ride at sea level to 2000ft, temp. 80-90 degrees (In Hawaii)
What Jets and needle come stock with my bike? and What replacment jetting & Needle/Airscrew Adjustments do I need to put in.?
From reading the threads it sounds like some of the jets/needle I keep/use are stock?
I'm Running Gas Mix (Motul synthetic) of 45-1, OK?
Presently, Bike is running good, plug is lt. brown with some black, but when I run hard for awhile, and then go to idle the motor "runs up" like gas in running out. If I crack the throttle a couple times then it seams to be back to normal? Thoughts?
Thanks for your time & support..
Aloha, Todd 
Posted by: jharmon---------------------
Todd,
I'm not sure what jets you need or not, but I have a Kx250 (1993) and had the same problem. Whenever I ran it for over 3 hours at high RPMs the engine would stay at a high idle. Sometimes it felt like it was almost breathing.
I didn't know what was wrong with it, but my brother noticed my radiator was leaking. I fixed that, took it for a ride, then the bike seemed to run perfectly fine.
I don't know if it was just coincidence or maybe the bike was running too hot.
Sorry I can't help you with the jets.
Good luck.
Jeff
Posted by: kdxtaz---------------------
Click on this address http://justkdx.dirtrider.net/
Hit "tech tips" then "carb tuning". It will tell you how to jet your bike and give you starting points.
Posted by: Canadian Dave---------------------
While you're there you'll want to check the New Bike Prep. article as well.
Your ratio looks just fine
David
Posted by: John Harris---------------------
I will suggest to you what the threads will tell you. First every bike is different which you know. Second, do the easy things immediately: sag, air box cover, etc. Third, KDX's all come jetted very rich. I suggest needle clip in next to top position, 45 pilot and 155 main jets for starters and work from there! Have fun.
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