I only got my bike last week. It's done 1,500 miles and has had its first service The fuel light came on today after 114 miles after a fill up. I'd only sat on the motorway, and did 51.4mpg. Apparently the range is 40 miles, making the overall 150 miles... at 51.4mpg..?? That doesn't seem right at all to me, it feels pessimistic. I'm going to fill up the bike after work today to see how many litres I've used. How many miles do you get before the fuel light comes on?
My apparent fuel consumption improved as the miles were added. Now get the light at around 150 miles. Can manage a range of 200 miles if riding sensibly (doing IAM at the moment).