i bought the snowmobile in a box so i dont even know if these are the carbs on that sled, maybe somebody put those inlets on there, i have no idea ... any how i took the bowls off today again and looked some pictures of pumpers and non pumpers, i see all the pumpers i have looked at dont have the skinny brass tube attached to the bowl itself. is that a way to determine, sorry for not getting in pics today, hopefully tomorrow