2003 Summit 800 HO lacks power on bottom

I have a 2003 summit 800 HO that has about 1800 miles on it. always stored inside and this sled has been taken care of meticulously. it runs like a top but lacks some power on the bottom end. If you are cruising and stand on it, it gets up just fine. On a dead stop, it almost has a miss on the bottom. i get beat off the line by just about everything and it kills me boondocking. standing on it from a dead stop wont even turn the track. Ive put newly gapped plugs in it. I have also noticed everytime i pull the plugs that there is a ring of oil around the cylinder holes. I thought that maybe the oil pump was too high and had it adjusted by a mechanic and it still has the excess oil on the cylinder holes. Other sleds that i have owned it has never had oil there like that. Is that normal? Could i be dealing with a plugged jet for the dead spot or could it be the oil issue???? when i pull the plugs they do not look fouled.

Which reeds would you go with for that sled?? and when you say pilot 20's do you mean jets?

I run amsoil interceptor and always 91 octane with a bit of booster everytime. Im going to give those reeds a shot. Thanks guys!!