So, the BMW is buggered. Again. Yes, again again. Or again again again. I've lost count, ok? To set the scene: 25 miles of riding on mixed roads prior to the breakdown, everything from 20mph city streets to the A14. Riding back from the meet at Connington, stopped at my old house to plan a weekend ride up to PeatBogHorror with one of my old housemates. Got on my bike to depart, and the fun began. Problem 1: First off, noted that when paddling the bike backwards with the steering at full lock, there is a sensation a bit like I'm rolling it over a never-ending manhole cover. Very small but frequent juddering, most noticeable through the bars but can be felt through the seat too. Not apparent when the front wheel is pointing forwards. Also worth noting that I managed to leave my disc lock on when setting off from Connington... didn't exactly pull away aggressively and no noticeable damage besides a scuff in the paint on my fork leg, but perhaps buggered the disc? Although if a warped disc was the issue I would've thought that it would be a slower pulsing sensation as the bent bit passed between the calipers, rather than constant juddering. Also would've thought that I'd feel a warped disc regardless of the angle of the wheel, rather than just at full lock! Problem 2: Eventually figured "well, even if the disc is warped, I still need to get it home to my tools - time to ride it home carefully". Put key in, turned key, usual procedure. Neutral, Oil Pressure, and Coolant Temp lights come on. Once ECU has run diagnostic, coolant temp light switches off indicating the ignition can now be used. At this point the bike would normally start and the oil pressure light would switch off as the oil pump kicks in. Instead... "TICK". Very quiet and soft "tick" sound, just the once, and immediately all the lights go dead, including the headlamp. Initial reaction is "oh bollocks, a fuse has gone". But sometimes this bike is just plain temperamental, so I turn the key to the "off" position then back to "on" to check if it really is a fuse. Lights come on, ECU runs diagnostic, completes diagnostic. Press ignition... "TICK". All lights go off again. Attempt to switch off and on again, this time bike does nothing. Yep, that'll be buggered then. I guess something has shorted itself. Seems odd that I had absolutely no trouble riding up to his house, parked the bike, left it for 5 minutes or so, wheeled it back out onto the road, and then it inexplicably died. Surely I should've had it cut out while I was riding it? Unless maybe it's the wiring to the ignition that is buggered, or something...? It was pitch black and the garage has no lights, so I'll be back tomorrow to try and look at it properly. In the meanwhile... any thoughts? I guess Problem 2 is just a case of checking the fuses and then checking absolutely everything until I find the buggered wire, then fixing it and replacing the fuse. But if anyone can think of good places to start looking based on the fact that it was riding fine beforehand, I'm all ears. Only other thing that crossed my mind is that the reg/rec could've gone nuts and fried the battery leaving it just enough power to start up the ECU but not nearly enough for the solenoid. Also, what on earth could be causing Problem 1??? It's the bit where it only does it at full lock that baffles me Almost makes me wonder if the two are related, if a wire is catching somewhere in something and knackering itself while also catching on something to create the juddering feeling. Oh, and we thought we could hear some kind of high pitch clunking coming from the bike (a bit like the sound of my spring loaded footpegs clicking into place), just when I first take it off the stand and roll it forward or back. The noise then stops until it's been back on the stand. He thinks it's coming from the bottom end, I think it's coming from further back like the suspension linkage or something. Or it could just be the poor tired on sidestand creaking as its relieved of the bike's weight. Will try to work that out tomorrow too. All in all... f**k IT f**k IT f**k IT f**k IT. Going there with a bunch of tools and a multimeter tomorrow to try and work it out, but any leads or suggestions in the meanwhile are appreciated.