Archive of BMW Motorrad Club Cape (2006 - 2019)

I need some technical information on the GSA. My GSA has 2500 kilos on the clock and is giving me + 8,8l on a 100km. That is quiet heavy in my books and I expected it to be much more fuel efficient. Is that normal? With the exception of about 300 kilos it was driven primarily on tar roads until now. I also did not push her ‘into the numbers’ – keeping it to 120 /130 km/h max 140. However, I’m quiet tall (2,1m) and weight about 130kg. The bike is also still running on the knobblies with which she was sold. Most of the riding was done on the West Coast where the wind is 99% of the time a definite factor. The bike is used to commute to work every day. I also expect to get more service out of the tyres. After 2500 the rear tyre is almost spend. Is that normal or am I doing something wrong? I kept the tyre pressure on 2.9 back and 2,5 for the front tyre.