Not on the ST ... but in '77 I hit a Roo while riding a CB400F Super Sports. It was between Camooweal and Mt Isa. It was early in the night, using a Cibe spot light on a long straight stretch of road. A vehicle coming in the other direction was a long distance away and our lights were troubling to us both. So we both dipped the lights, so off went the spotty. Man what a difference in light. I was thinking ... since I was doing around 120 kph and slowing, if a roo came out now I would not see him until its too late. Sure enough ... out he came and instantly I knew we were going to meet. I braked hard both front & rear but the instant before impact I let go of the front brake and braced the handle bars. Impact was savage, right of centre. The handle bars went full lock right and I summersaulted off left into the dirt on the LH side of the road. Rolling up in a ball with my hands pulling my full face helmet down ... chin to chest, I was winded but perfectly fine. Wore my gloves through in a few spots, split a thumb nail a bit, some scrathes where my jacket came up above the belt on my back near the kidneys and a small scratch above my boot on one leg. Scratched the Bell full face pretty bad on the back and side.
The bike was not too bad. Had a dent in the tank, scratched the crash bars up and sent a highway peg mounted on the crash bar through the side cover on the alternator. This actually locked up the motor. It was easy fixed in daylight but sure was worried when it was totally seized in the night.
A friendly guy came along with a panel van about half an hour later and we loaded her into the van. He kindly gave me a lift into the Isa.
The mid sized roo died in the altercation. To this day I feel very lucky at the outcome, both for Bike & Rider.