Hello All. I am gonna get right to business. I have a 93 Indy 440lc. In warmer weather I lose all bottom end with lots of bogging with load or without, cold weather the sled runs great. My clutches are set up perfectly, no cracks in carb boots for too much air. Between myself and 3 other mechanics it comes down to carb problem but all 3 dont know much about them. This is what i have done to the carbs so far. They are very very clean, the throttle needle/clip has been adjusted properly, and air screw is set to .75 (3/4) of a turn. Possiblities for issues are needle and seat wear? 10thousand miles with no change yet. This machine just started doing this for the past 2 winters. It only happens in warmer weather. -10 and above. Any suggestions or help or thoughts would be great. if you need any more info on the sled please feel free to ask. thank you from Ontario