Ms661 cm first gen wj 134 carbs before they switched to the 140 with the upgrade kits. These carbs even tho are equipped with the 5110 black valve will accept an run very well with the 5104 white valve an updated controller there was nothing wrong with these carbs when removed they were solely replaced due to the new wj140 supplied in the factory update kit . Asking 28$ each shipped would like to see them go to someone that can use them vs throwing them in the scrap bin.