Hey everyone... I have a problem with my carbs on my polaris xc 700, I have 39mm Keihin D-slide carbs and if I do not turn the gas valve to the off position when shutting the sled down, I flood the engine, sometimes being so bad that I must drain out the cylinders... I was wondering if this would be my needle and seat... and if so... how to change, and if they are expensive... any help would be greatly apreciated... thanks guys

John...

Yes, and this could be caused by your float having fuel inside of it, holding it open.