hi guys i have pkjet80 slanthead from zoom, i just notice this cold season i have a hardtime to start the engine, i have a pullstart. i dunno weather my carb is always empty ,coz everytime i run the engine i need to push the tickler button several times until the gas come out on the tickler it means its full and i start it its ok , but i never had this problem when its summer time i dont use tickler button that much. i always lock the petlock after use . i dont see bubbles on the tube so it means its ok