Sooner or later a new radiator/s will be required, for the health of the engine, overheating can cost an awful lot more to repair than the cost of a new replacement radiator - make sure and stop those overheating, leaking and blocked up coolant channel related problems?
It may be an obvious thing to say, but renewing all the hoses, hose clips and anti-vibration fasteners at the same time would make excellent sense.
This component and perhaps some of those listed below maybe of interest:
Add as many components as you wish to the same shopping cart, new anti-vibe mounts and fasteners for example, and still only pay the same single fixed price shipping cost.
This component may have other applications within the Kawasaki model range.
TIP: If you are struggling to locate spares the Suzuki DR-Z400E shares many parts as they are essentially the same machine - but do your research before ordering?