On the kx250 I see the 98-99 jugs are similar part #1851. I have never seen the jugs or power valves in person. On the micro fiche I see there appears to be a slight difference between the way the center power valve appears. Almost like there are channels cut in the top of butterfly valve on the 99 model and not on the 98. We are talking part #49116.
Which one is better?