i have a buddy that has a sevylor, i think it's an x series. it has boston valves, the same as on my nrs wild river tube.
i have an nrs wonder pump. it has attachments that fit my tomcat (summit 2 valves) and my hyside paddilac (leafield c-7 valves). and the bare hose without any of the attachments on it fits those boston valves perfectly.
i don't recognize the name of the valves on your link, but i looked around the net, and other sevylor k1's come with boston valves.
if your boat does have boston valves, a pump similar to that might be your solution. it's a pretty cheap pump (only costs like $35 on nrs's website, which also sells replacement boston valves), but mine has lasted me for like 3 years so far.
post a pic of your valve and i'll be able to tell what it is.
hope this helps!!
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