Same bike and same problem. Bike was running fine, sent it in for new back tyre, service and MOT. I had specially not filled the bike with fuel to make it easier when they took the tank off. Got the bike back and took it easy with new back tire. Filled it up next morning and noticed the "tacho tango". Started gunning it after a few miles and it has a definite fueling problem as the engine suddenly splutters and it feels like Im running out of fuel but then just as suddenly the bike takes off again. I have now done 156 miles and looked into the tank this morning, there seems to be about a half liter of fuel in the tank but my fuel light has not come on.......nor has the bike grinded to a halt even though I have not switched over to reserve. The bike shop says my fuel tank looks murky and needs to be flushed. Im doubtfull but will update once this has been done. The spluttering is no longer as severe so this leeds me to think that maybe some blockage has shifted a bit???? PS. Never send your bike in on reserve as this can mask a problem when you get it back also they have rechecked the wires and claim everything is OK.