If you don't have a roof rack, you can still transport your kayak. You'll just need to get a bit creative. One option is to tie the kayak to the top of your car. You can use rope or straps to secure it in place. Just make sure that the kayak is secure and won't slip or fall off while you're driving.
Another option is to put the kayak on the hood or trunk of your car. Again, you'll need to use rope or straps to secure it in place. This option may be a bit more challenging, as you'll need to be extra careful to make sure the kayak is secure. But it can be done if you're careful.
So, there are a few ways to transport a kayak without a roof rack. Just be creative and be sure to secure the kayak well so it doesn't fall off while you're driving.