I have a 2007 Wr450F that this weekend developed a crack (tiny) in the radiator. There was no impact of any type. It just started to steam a bit. Put an end to the riding for the day as it did drain some coolant. I do have Works Connection radiator braces installed (and have ahd them since new) so no changes to the bike. Any thoughts on what happened and more importantly how to inexpensively fix it? I do not want to buy a new radiator if I do not have to.