On a B3 it's 4 bars to the halfway mark on your dash gauge. On my bikes experience it will go 1 over half way when bike is stuck in traffic and not moving or just dribbling along slowly. At this point or earlier fans always engage to stop overheating. If your gauge goes over this much when stopped it seems likely there is a problem. You should feel a flow of hot air on your left thigh when the fans come on too. It's very easy to check just run your bike and get off and watch fans and gauge. If your gauge goes over the half way mark when you are going fast enough for good air flow (not slowly in traffic ) then that surely indicates something is very wrong.
That's what a 2 year warranty is for.