Had a long weekend from Australia day where I went over Mount Hotham with a bunch of mates also on cruisers. Some ride their bikes sedately, some ride a little quick, and well some of us ride them a bit hard. On the way DOWN from Mount Hotham towards Bright I lost my rear brakes entirely and my front brakes weren't far behind. I was hammering it pretty hard with lots of heavy braking required to slow the half tonne pig down (bike +rider +pillion). About 2/3's of the way down hitting constant 25-40kmh corners, I noticed I was having to press harder and harder on the rear brake until it was doing absolutly nothing. Twisted the wick back in and took it easy for the rest of the way till I could pull over in the first town. The rear brake rotor was totally glazed off and had a MIRROR shine to it with blue heat streaks right the way round, the dual fronts weren't much better. Took it easy into Bright then stabled the steed for the night. The next day the brakes were fine again although they did start to go off slightly later in the day up in the Snowy's. So anyway, my question is, should I replace my brake fluid? As I understand it the temps made the brake fluid go slightly gasseous (or something like that) which is why it felt like I lost pressure. Once it all cooled down it was fine. BTW I had new pads on front and rear before the trip, oh and there is no need for the obligatory, "If you want to ride fast get a sport bike" Toasty.