Last wednesday, I was off on a 4 day ride, and on a country road just short of Maffra I came upon a loooong straight stretch and decided to take the bike up to higher speeds to see how it sat on the road and felt. I got to 200kph and sat there for a little while, pretty impressed with the way things felt so I took it up a little more...at 210, I decided "nyah, this is too fast on a regular road - back off and get back to normal riding"... So I let the bike ease down, but at about 160-170, I felt an odd force, like the bike tyre was following a groove in the road or something....at that speed I just relaxed on the bar and just go with the flow....it disappeared. By now I'm down to about 120ks, when I feel the back tyre become a little "oozy", and want to drift a little....I added some throttle gently to stabilize things, and noted that the rear-end was feeling squirrely...O-ohhh...I'm thinking I have a rear tyre deflation, and I know that as I reduce speed the rear will get veeeery lose....at about 80k's I am barely feathering the throttles to get a feel for what the bike is going to do, as I allow the speed to come off as slowly as I can without shifting weight from throttle shut down etc.... Finally the bike starts to get very loose at the rear-end and sends me into a slight drift across the road into the other lane...gently tip-towing the bars, I regain the right ballance and at about 40k's I know I am slow enough not to get too injured if I'm tossed off...down to 20k's and it was to slide all over the place, but with adding some steady throttle to keep a little power going to the back wheel, she steadies and I am able to stop from there. Luckily for me...it was a rear tyre!...It looked like I may have picked up a nail or something, which then threw out of the tyre when I took it up to high speed, causing the unexpected deflation. With the rear tyre deflated at speed, it was similar to riding on a very slippery surface...you just have to make gentle inputs until you can get things slowed down enough, where injuries will be minimized. Stabilize things with a gentle throttle and ease down slowly. Fortunately for me, I was on a long straight stretch of road, and was able to work it down safely...had it happened in the twistier areas, I might not have been so lucky. It's also worth noting that I had to ride with the rear tyre flat as a tack for about 22k's into Maffra. I was amazed actually, at how the tyre stayed on the rim, and allowed me to crawl along at about 20k's, but VERY watchful of the rear-end sliding out. Be especially careful of road camber...at one point I was riding pretty much sideways until I could get over to the centre of the road and ride the high spot...veeeery gentle throttle inputs, and using alot of "seat of the pants" to feel the bike along the road. Ultimately - no damage to the bike or the rim - a new tyre, and away I go a few hours later. Just in case my experience might be of some benefit to someone else. John.