2B011587 former serial # 2013 250 Pro XS 2 stroke. I am swapping out this motor for a new 250 Pro XS 4 stroke. While I am waiting for the new motor I am doing a few other maintenance items. I'm not sure whether my fuel line will work with this new 4 stroke. Anyone know ? I was considering replacing it but wanted to know if it is required or just recommended ? This would be a good time for me to do it if I need to. Seems like I remember reading a while back that these two motors have different fuel line requirements. When the new motor comes I don't want the surprise. I'd rather just do it myself while I'm waiting.