Buy some 7/32" inch fuel tubing for the Kawi's. The much more common 1/4" tube is a sloppy fit on the carb fittings. These sleds originally had the little spring type clamps on the fuel connections, but if you use 7/32" stuff it fits so tightly you hardly need a clamp. I usually stick the end of the hose in a glass of hot water to soften it up before sticking the hose on to the carb fitting, then it sticks like glue.
The 7/32" tubing is tougher to find, but it's worth it.