Ok ive had two blaster I just bought another one today and each one ive had ive either cracked the piston skirt and seized the piston or just locked the motor up....now ive got this one and after i let it warm up a lil and then ride it its like i can feel it sputter in the middle of each gear unless i get on it and then it will go just fine but its doesnt feel rite riding slow threw the gears it kinda acts like the carb is maybe stopped up does anybody have any oppinions on what mite be wrong?