further to this....

I removed the rad, had a good look and cross referenced pics on the net. It was bent but not twisted. I sent to with a rubber mallet, clamps etc and got a lot of the bend out. I then took it to a rad shop who pressure tested it. All good.

I can now get the front wheel hard over in a left hand turn without the front fender hitting the rad louvre.

Things I learned....an ali rad (we have on the 690) cannot be repaired if holed...you may have a little luck with Devcon...and its good to have on you for a trail side split. But consider it a temp fix. If its twisted, you can rarely get it untwisted. No 3rd party aftermarket rads for this bike...OEM only -$$$! Ouch if its out of warrenty or you holed it on the trail.

Lots of people report the fan wearing thru the rad fins and holing it. Pop your fan and add a strip of hose, silicon tube on the meeting edge. Do it before you have a problem. Remember, no coolant equals no engine!

After my session with the hammer

I have used these guys before to repair my DRZ400 radiator....    did a pretty decent job. 
http://www.motorcycleradiators.com/
quick turn around.

Sorry - didn't realize you lived in Western Australia!