I'd like to know what the left and right carb air fuel mixture screws are set for "stock"? and what is working for others. I thought I heard 2 and 3 is stock. Is this right?
The problem I am having is starting cold and choking. It idles good for about a minute and then dies. I have tried choking at different levels and it just won't keep running after a minute or 2 it dies.
What about the stock setting for the clip on the needle? Would this have an affect on a cold start with the choke? What is this setting stock?
The reason I need to know is my dealer SUCKS! Hope someone can help me. THANKS!

 

I just looked thru the entire carb section in my Raptor shop manual and it gives no nominal settings for the pilot screws. It simply says that "prior to disassembly be sure to check the number of turnsout from seated".Normally on Mikuni carbs the nominal setting is 1 1/2 to 2 turns out from seated. If you haven't altered the factory settings you might try seating them & carefully noting the number of turns on the pilot screw to seat them and then try increasing the turns by 1/2 to see if that helps idling. The needle jet would have no effect on your idling as it operates in the 1/4 to 3/4 range of the throttle.
The nominal setting on needles is the 3rd position, and strangely, it isn't mentioned in the official Yamaha service manual either.

 

My dealer found in a bulletin that they should be 2.5L and 3.0R from full closed. Unfortunately, the dying could be from not leanout at cold OR too rich and loading up after a few minutes. Sorry, it's a toss up, but don't be too afraid to experiment...you can always go back to full closed and start over. Hint: mark a fine black marker dot or line on your jeweler or small screw driver used to do your adjustments. This will give you a more accurate reference of turns. Guessing doesn't work, and unless your Superman, you can't see the tip of the screwdriver. Good Luck!