Yes, 13 R/K. Zero symptoms really. Just when at operating temps, and say you stop for a dart or to get gas, you get all ready to go and go to start.....just turns over like it's going to start as normal, just doesn't. Turns over, no sounds that are diff, no stumbling or coughing, nothing, just turns over and doesn't start. Sometimes if you just keep cranking (taking a second before attempts of course) it will just go after a few attempts, sometimes, it starts as normal, but usually it likes a wee rest, then it's good to go. Nothing crazy done to bike, cams, pipe, tune, normal stuff, have changed rocker cover gaskets before, so while in there I changed the breather filters.
Weird I know, sadly I'm used to it
Paul