Quote:
Originally Posted by alvaro84
Bad that I can't directly compare Gray's results with Teresa, because that 110km/h that's a typical speed for you counts as a rather high speed pulse for me (my normal speed is more like 80km/h or 50mph at 3200rpm, or even a bit lower) - but based on that I can do better than 80mpg with a 650 I'd still say there is room for improvement. With really good aero at those speeds, though.
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I have been meaning to ask you some questions about how you get the FE you get with such a large engine. Although BMW's have always got better than average fuel economy, than other bikes.
1. What is the bore size of your carb. or fuel injector?
At 80km/hr the GS500 is turning at 3000rpm in 6th gear, I find I have to gear down to 5th gear if I want to accelerate smoothly. I do suspect that I may be running rich but I will only make changes after installing a O2 sensor and readout. At 110km/hr I use less than 20% throatle, which is just off idle, at 4200rpm. The GS500 has 2, 34mm mikuni carbs, which may be way to big for good fuel economy. The Kawasaki Ninja 250 has 30mm carbs 22% smaller. I may look into getting smaller carbs maybe as low as 28mm, if mikuni makes ones that will fit in the place of the stock carbs. I do agree that there is room for impruvement, although I dought that at 110km/hr I will get better than 70 -80 mpg. I will keep going to see at what level it ends...
If you look at the 82.5mpg I got at Lacey averaging 40mph, between 30mph and 55mph, it is clear that under the conditions you face I to would get much better than the 68mpg I get now.