OK, here’s my problem, which I thought I’d throw there to internet land for any ideas and to see if anyone else has had a similar problem. Cold engine, choke full on. Bike starts, runs for up to 3 or 4 minutes (long enough to do up jacket, put on helmet and gloves and get up to 1km down the road). Revs start to decay. (if riding you can feel a hesitation, especially if applying power, it pauses then sluggishly takes off) Bike stalls. Takes anywhere from 1 or 2 starts, to up to 10 minutes of trying, to get bike running. When doing this it either stalls immediately, or runs for up to 20 seconds at very low revs (approx 600 rpm). If choke is not on full, it won’t run at all. Touching the throttle while running causes instant stall. When the bike decides to work, revs will climb quickly to over 3000 rpm (what I’d expect with a warm engine and full choke). On a couple of occasions the revs have started to drop, but then recovered to over 3k, so it never got the point of stalling. As I said, sometimes I can get it going pretty quick, others it takes 10 min, or longer on one occasion. Once the bike is running I can reduce/shut off choke and it will be fine, runs as normal. This used to only happen after long periods of not being ridden (if I was away for over a week), but in the last couple of months has happened a bit randomly. Last week it happened on Thursday and Friday evening, but had been fine in the mornings. Last night I had to get the RACV to get a flat bed to get the bike home, it just refused to start. I ended up with a flat battery, RACV man tried with his power supply connected for a while, still no go. Bike is serviced by Pete at Everything 2 Wheels (major service was at the end of March), and I’ll drop it back into him when I can get it going/towed, but he was a bit mystified on Sat when he gave it a quick look. Bike is a 1999 Honda CBR600F (carbies, not Fuel Injected), has done about 50k km. I use it as my daily transport, and apart from this problem its been pretty good for the 2.5 years I had it.