My 2007 650 X Challenge is leaking from the radiator and after calling the dealer for a replacement I found there are none in the US or Germany. I have looked at several used part places with no success. I also found an aftermarket radiator made by Pace Products in the UK i believe but have not been able to locate that company. Another avenue I have been looking into is using a radiator from a F650 GS but seems to be several differences such as the upper mount location, no expansion tank. I love this bike but not sure what to do with it if the parts are not going to be available????