Please Help - injected SV with carb icing?

I have a 2004, fuel-injected sv650s with 30,000 miles on the clock. It's been mine from new, and this is the first time I've had any kind of trouble with it. Basically, when I drive home from work, I do 10 miles through traffic, then 10 miles down a duel carriageway at about 60-65mph. When I leave the duel carriageway, as soon as I close the throttle off, my bike then starts playing up - any attempt to blip or open the throttle from closed makes the revs die away and the bike dies. It's like the idle speed has dropped to 0 - the bike kind of struggles to tick over, but the revs give out as soon as I try and open the throttle even the tiniest amount. If I give it a load of throttle, ie. over-rev and slip the clutch, then I can get the bike to pull away. Once it's moving, if I ride along at constant revs, the bike intermittantly kicks itself forward with a surge from nowhere. The past couple of days it's just been keeling over as soon as the revs drop below 4-4.5k.
The weird thing is, in the morning it runs as right as rain, and the problem literally only happens when I leave the duel carriageway about a mile and a half from my home. This makes me think it can't be a spark plug problem, otherwise I'd notice it more often. The garage insist it's carb icing, but putting Silkolene Pro FST in with my fuel to counter carb-icing hasn't made any difference so far.
Do you have any ideas at all?

Many Thanks,
Ali

Can't be carb icing as you don't have carbs and unfortunately don't have any experience with FI bikes to know, sorry.

you did point out to them the fuel injection didn`t you?

[Biker Biggles]

Sounds like the injection equivalent of the choke sticking,ie running too rich.I believe they have a temp sensor for cold starting which may be playing up.If you take out the plugs and inspect them you may find they are black with sooty deposits which would tend to confirm this.Same thing would be caused by a clogged up air filter,so has that been changed in living memory?

Originally Posted by Assen

I The garage insist it's carb icing, but putting Silkolene Pro FST in with my fuel to counter carb-icing hasn't made any difference so far.
Do you have any ideas at all?

Many Thanks,
Ali

you have not got any carbs? so the garage are idiots

Sounds like the standard front pot getting wet issue. Have a search and you'll find similar reports and solutions.

edit: assuming it's been wet, of course, which it has here.

I did tell the garage it's fuel injected, they insisted it's still carb icing, or whatever the injected equivelent of that it. The problem isn't just in the wet, so I'm pretty certain it isn't the front cylinder issue. I'll try and check the spark plugs this weekend, to see if they're clean or not, but I don't see how that could be causing the problem, cos if it was surely it'd happen more frequently than just the last stint on the way home? It must be something to do with the throttle being held open for 10 miles at half decent revs, then shut off pretty much to closed as I leave the duel carriageway and stop to give way at the roundabout on the exit.
Thanks for the suggestions so far - if anyone has any other ideas I'd be very grateful to hear them.

Originally Posted by Biker Biggles

Same thing would be caused by a clogged up air filter,so has that been changed in living memory?

The spark plugs and air filter were checked 2000 miles ago at the 28K service. Although the weather's been crappy and the roads filthy, so I guess it could've got clogged up already. I'll try and check that this weekend as well.

Originally Posted by Assen

The garage insist it's carb icing

Originally Posted by hovi5

you have not got any carbs? so the garage are idiots

Got to go along with Hovis there. Never, ever go back to that garage!

[TSM]

Carb Icing is just a term that was coined when it was discovered, the ventrui effect still applys to FI bikes but it just does not happen as much. This is as far as i understand it.