After a very entertaining evening watching the MotoGp, I headed off from Flipper's at about 11.30 last night. A couple of kilometers up the road, the bike stopped. Engine was running, gears selecting - just no forward movement. Oh, and a big puddle of oil. I rang Flipper, who offered me the use of her Across, on the condition that I allowed myself to be photographed. I chose option 2 - to push the SR back to Laverton. After a rethink she offered me the use of a toolkit and I did a little surgery. The countershaft sprocket nut had worked loose, and the forward sprocket had fallen off the countershaft. The collar behind it had also worked loose, to the oil seal was weeping. There were no lost parts so I did the nut up (finger tight - gulp) and gently rode back to Flippers where we found the BIG SPANNER and did it up "break wind" tight. The trip home was tense but uneventful, and the SR lives on. I'm glad the sprocket fell off on a suburban street, rather than the freeway - which is where I'd have been if it all held together another 30 seconds. So, thanks Flipper. A great night's TV and a roadside rescue. Saved me from a cold night lost in Mulgrave.