It is getting difficult to start the bike. It doesn't run after firing the first time and needs a second start. It then misfires for a brief period before running correctly. There is a smell of fuel (unburnt from the exhaust?). This happened before I filled up yesterday and again this morning with a full tank. One point I noticed when filling is that it took until this morning for the fuel gauge to display the full tank. Once running it behaves perfectly.