Bought an 06 yz 144 last october and took it up to alto [texas]for the halloween ride,ran great but the carb was dumping a little fuel. Then i took it up to sam houston national park for some good old single track bike ran strong but when we were finish up i noticed the fuel was poring out like crazy.so i tore it down last week checked the piston,compression everything getting it ready for this season,cleaned carb adjusted float,and found a few things. It has the Eric Gorr 144 kit with a new piston and rings also ported ,the carb was bored out and polished,and the head was cleaned up [shaved].Also had the wrong spark plug in it. I put the correct plug[according to Eric Gorr].Fired her up and went for a quick ride in the field behind the house. Dam i could hardly hold on this thing is like a totally different bike! I should have done the checking when i first bought it but im glad i got it done,this bike is crazy.