i dont kno why, but my Jato has suddenly, i dont know, lost power

i drove it around and the next time, after it snowed last week, that I drove it, it just didnt get the power as usual. I didnt change anything and am so confused. Before it snowed, the car with the throttle trim set at zero would still drive off without any throttle on at all, and now it just sits there idling. I know it didnt get wet and have tried some other things, such as: loosening the clutch, loosening the brakes to make sure they werent too tight, and richening it up, and also changed the batteries in the car itself.

The air filter isnt too dirty and i dont know what the problem is. when i have the throttle trim at zero, it will go(when i hit the gas), but doesnt have much power when i do that, it usually takes about 50%throttle movement before it goes anywhere and when i floor it, it still isnt going as fast as usual.

I made sure the radio was at 50/50 and not 70/30. the funny thing is though, when i turn the throttle trim all the way up, it drives like normal just without moving very much. Any ideas? and also, i figured out one of the bearings is a little weird, do you think that could be the problem? i didnt think so because when i lube that up it works fine( its like warped or something)

I havent touched the idle speed or the low speed needle, but do you think that could be the problem? they are both at factory settings so i think they are fine.

[:-] im confused, can anyone help me? ???[&:]