they are hard core insane! my bike weighs about 120 kg an is considered 'heavy' how much does a loade dup GS weigh... there's no way I would consider even tryin to do what they did - an one of those blokes looks the wrong side of 60!!!
if u really interested - I can send u some google map drop pins on where to go... jus pm me. I wouldnt go alone tho - altho I can categorically state I have no interest in helping u pick that monstrosity I mean motorbike up ( where I ride in sai kung I dont think u can attempt - too narrow steep an twisty. (
lau fa shan might have one track u can ride - but I'd walk em first - or get a lighter bike...