yeah i pulled the tank all apart and re plumbed everything with fresh stuff took the needle valve off blew thru it under water and no leaks there. put the motor all back together on the plane. and i am still having trouble getting it to run consistantly. it will berunning just fine then all of a sudden, bam! it start leaning itself out a lot and just screaming. there are no big air bubbles that i can see comming through the line just some very very almost micro sized ones. i dont know if its just a quark with that evolution trainer system or what. but im almost affriad to fly it becasue i dont want it to lean out and burn up on me in the air..m,y dad says im being to anal about how the motor runs and im trying to have everything be to perfect, and that 2 strokes are finiky. maybe hes right i dont know. i wasnt the one that owned the plane from new so i dont really know how it ran in the first place.