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
KTM 1190 ADV, KTM 530 EXC-R
Gone: Ducati 999R, KTM 530EXC, KTM 990ADV-R, KTM 950ADV, KTM 690, KTM 640ADV, kTM RC8R, Ducati 996S, Yamaha R1
And how can this be? For he is the Kwisatz Haderach!