We do not recommend using the scupper holes for the carts. The hulls are too heavy for that and may cause damage in the scupper hole areas. A wider heavier duty flat type cart is best with straps to anchor it in place. The scupper type carts can ...
There are different variations and sizes of scupper plugs the Riot and Azul Kayaks. For Azul Sit-On-Top Sun series of single and tandem kayaks you can order that plug here For Riot Escape 9 series kayak you'll need the Large size ones here - sold ...
See link at bottom to view and download the Riot Whitewater Owner's Manual from 2008. Works fairly well for info on current (since we have not changed them much) and older model (discontinued) kayaks.
The Double J-Bar for Car accessory is designed to attach one or two kayaks on the top of you car. Can also be easily adjusted to carry one kayak. It also comes with 4 straps. See attached link below to download the How To Assemble manual or video ...