Well, you asked to make it natural, right?
As someone who used to kayak a great deal, I would assume, if you carry kayaks at all, that you carry single-person seak kayays, maybe double sea kayaks, white-water kayaks, and probably those little sit-a-top fool-around-on-the-water kayaks. But if I've done my research about what type of kayak I want to buy, at this point, if I said "what kind" I am probably thinking which brand.
A more natural question would be "do you carry double (or tandem) kayaks?"