Originally Posted by Deuce
There is an overflow hose from your rad cap mount that goes into the overflow tank. When the rad cap fails to seal or your engine overheats the pressurized water flows through the hose into your overflow tank. That is why you don't see any seepage from the rad cap.
Ah, perfect - makes sense. Thanks again guys
2012 KTM 990 Adv-R
2014 Superduke 1290R on its way
And how can this be? For he is the Kwisatz Haderach!