I have a 05 F7 carb, it will studder when I pin it after comming out of woods. If I keep the rpms up in the woods it doesn't seem as bad when I punch it . Some people have told me it needs smaller jets while others have said I need to adjust the oil injection pump. If anyone knows for sure please let me know. I cant afford to make my sled a guinea pig.
I have the same issue, 03 F5 carb. I don't have a problem at WOT, but a periodic hesitation at part throttle. Seems like an electrical miss on mine, but I can't find any frayed wires. Maybe a coil going bad or power valves cycling at lower rpm? I agree, I don't want to spend a ton of money chasing this but it is annoying.
V force helps but you have to have the right jet size....if it's jetted too rich it will hesitate a little, which is what mine was doing last weekend with the 530's in it, switchin' to 520's this weekend to see if it gets any better...if not its on to some 510's