I have only been riding a short length of time, and the last couple of times that I took my bike (Suzuki GSR600) out I found that it stalled when I was travelling at relatively low speed when changing to a lower gear.
Two example situations:
1. Traveling at approx 50mph and then needed to slow to a stop at a "temporary roundabout"... caught me a little off guard and so thoughts were on the surrounding traffic rather than controls of the bike.
Slowing down using brakes and pull clutch in to work my way through the gears and then the engine cuts out.
2. Traveling at approx 40mph and needed to slow down to turn left. Again, didn't really know the roads and so was a last minute slowing down... realised that the engine had cut out and so needed to come to a stop and restart it.
Is this due to rider error? If so, could anybody pinpoint what this could be? Am I holding in the clutch but not closing the throttle fully or something? Or is it a mechanical problem that needs looking at
On both occasions, I managed to start the engine again very quickly.
liquid metal: I had a GSR a few years ago (excellent bike) when mine was new it kept cutting out so I turned the idle up a touch (to about 1500 rpm).
Then, after a few miles of running in I turned it back down again (to about 1200rpm) and never had the problem again.
I would suggest getting an oxygen sensor eliminator, though, it'll smooth out low rpm riding and quicken throttle response as well as keeping the FI light off when you ride it hard (it can flash on when you’re having a mad moment).
Smidget: An eliminator put in the wiring loom will eliminate the oxygen sensor, thus making the ECU think all is well with the air fuel mix.
liquid_metal: Spot on. Smidget basically explained what it is. They are hard to get hold of now though as Dynojet have realised people are spending £15 to get one as a cheap fuelling fix instead of going the full way and getting a Power Commander so Dynojet will only supply them as part of the package with a PC.
There are a few bikes the £15 fix works very well on, three examples being the new Fazer 1000, VFR800 and GSR.
bikemadben: It's also worth checking your sidestand cut out switch isn't loose.