Can any of you PLEASE tell me what the stock from the factory idle mixture screw settings are for right and left carbs on the Raptor? I have heard all kinds of things from different people and nobody seems to say the same thing. I have a Yamaha service manual now, and it doesn't even say what the specs are! (you guys look in your manuals...am I blind or something?) Which carb runs the richer screw settings? I've heard it both ways. Who is the authority on this? I am trying to tune in my low speed mixture and don't know where to go at this point. For those of you who say the 27.5 pilot jets are working great, what screw settings are you using? All help on this subject is greatly appreciated.

 

Scott,

I think I replied to another request (maybe yours) about this. With my stock settings, the dealer verified that 2.5 turns out on the left and 3 out on the right. I JUST changed my head pipe and silencer, and surely enough the right does have a bigger jet from factory, in this case, mine had a 140 in the left and 145 in the right, leading me to believe the right would need more idle fuel as well. Sorry if I confuse the issue, but this is something I've verified for you.