got an 03 yamaha blaster all stock. has great spark, but i noticed it only sparks at the beginning of each kick. has compression, good reeds, is getting gas as spark plug is wet after kicking over for awhile. any ideas??? would like to get this thing up and running. oh, and carb is spotless, so is air filter. every so often (very rarely) it will slightly cough as if it attempted to start for a split second.