Join Date: May 2007
Location: Hermitage/Nashville, TN
I've got big, fat E45s, but they probably only cost me a few MPG. I haven't done any testing with and without the bags in identical conditions, so I can't say for sure.
But, based on experience I'm guessing that it's probably only 3 or 4 mpg at worst. My tendency to cruise at 80 mph is probably a much greater cause of mpg loss.
[I]If you're not moving forward, you're probably in somebody's way![/I]
2006 Yamaha FJR1300AE, Cerulean Silver
2005 Suzuki DL1000, blue - sold