So a little background first. I have an '08 Hyosung GT650R with currently around 7k on the odo. Several weeks ago I noticed that it would occasionally miss very badly while riding along at 60 or 70km/h, from memory between 5 and 7krpm. The first time this happened my first thought was out of fuel, though I couldn't see how as the fuel gauge said I had plenty left and I'd only done 170km on the odo since last fill (normally get at least 250km). So I stopped on the side of the road for 30 or 40 min until my mate turned up with $5 worth of fuel. No missing after that for the last 5 or 8 km in to work. The next time or two it happened I rode through it rather than stopping. After a few min of missing very badly it seemed to go away however in both cases I was most of my way through a (say) 50 min ride when it started to happen, so maybe it was still an issue but I simply reached my destination. At this point I booked it in for a service (6k service). Basically they did the service but couldn't find anything which could cause the missing. The next time it happened there was a twist: it started stalling taking off from the lights. It did this three times in one trip on the way into the city. Also when you blipped throttle going into 2nd/1st it would make a sort of burp sound (not a pop) and the engine would miss. At this point I booked it in again and left it over the weekend. Come Tuesday it would not crank at all (think the same sort of thing you get when you leave the kill switch on). I tee'd up the dealer doing the work to pick it up for me at no cost and they came out on the Wednesday and picked it up. After being in the shop for a week (mostly because they didn't work on it for three or so days when they should have) the verdict was 'dirty/bad fuel'. Apparently there was carbon on the sparkplugs and they took a bunch of bad fuel out of the carbies, as well as carbon (iirc) in one of the jets. No crank issue was a faulty sidestand switch. End result, I had to pay for this work. Two days later the missing issue happens again on the way in to work. I've booked it in for tomorrow and AFAIK am at least getting a decent loaner bike while they try to fix it again. I'm also thinking about getting my $ back given that I paid for them to fix an issue and they have not done so. In summary: 1. Always happens a decent way into the tank of fuel (least km's was 130 on the odo). 2. Went from missing to stalling. 3. Carbies have been stripped and cleaned, fuel was 'guaranteed good' at least the last time it occured, new spark plugs. Thoughts on possible causes?