Check out this link for info on tuning carb, its a scooter site but the information should be universal.
http://scootrs.com/tech.cfm?tip=tunecarb
Maybe some of you tuners can check it out and see if its good info or not.
I just got in some pilot jets from Mark at Go Fasters and was going to try and tune according to info I found and see if it works.
The weather is going from low 70's to 60's but it should get a little colder before winter is past so i'm going to concentrate on getting my jetting right and making notes for future use.
Here is another link that should have some more info that will be helpful.
http://www.keihincarbs.com/tips/gate.html
also check here
http://www.gasgasrider.org/forum/forumdisplay.php?f=15
Good Luck
Ron
ECDE200 2004