You obviously don't know how EFI works, TMAP sensor along with the O2 sensors will tell the computer how much fuel the engine needs for the optimum fuel-air mixture, according to the barometric air pressure.
The higher in elevation the less fuel the motor needs= better MPG.

later..Randy

 

Once I got my '86 running perfect the mileage showed it. For the longest time 36 to 38 was the best, and that's what I now get racing around town solo. But I was "jump up and down" excited when I began getting 42 to 45 mpg for the last 3 months with 2 up traveling. And that's on an 80" with ev27, K&N filter, stock exhaust and carb jetting.

So I'm amazed to know that the bigger motors of today can still run in that range.

Funny how some cars are now in that range too. All that weight and the box design.

I'm curious that in this day and age, why are we not getting much higher MPG on two wheels?

 

More power and more MPG. Sounds like a slam dunk to me.

 

What an utter nonsense. According to your theory in vacuum we could ride with zero fuel consumption. Alright, serious now. The energy contained in fuel is what makes your scoot move. Air pressure is irrelevant with EFI because it compensates for that (you get lean mixture with carburetor, not good for engine nor fuel economy), you still have to open throttle a little more to allow engine to output power needed for given speed. The only thing different in high altitude is the top end power, which is going to be less because to get power you need to burn fuel, which in return needs air. Less air > less fuel you can burn > less top power. That's why overcharging was invented - to pump more air into engine so it can burn more fuel and output more power.
Knowing a few terms about EFI is not enough if you want to make sense and stop people laughing. High school level physics knowledge is essential.

 

I ride along side of EFI bikes on a regular basis, my carbed S&S 111's mileage increases with high altitude, and so does the EFI bikes, time after time.

After hearing the MPG's of the 14's, makes me feel OK averaging 40 at sea level two up, got high as 46 at altitude.
With 100+hp, I don't miss the steady 46-50 I was getting with the 80" as bad.

 

I'm getting 40 mpg on my 2014 SG, with 700 miles, @ 2300 ASL.

Alan

 

I'm here on the East Coast about 400 FT ASL, so that 43 MPG works for me.

 

I've been getting 44.5 to 45.5 mpg. On scenic ride yesterday got 48 mpg. I'm happy with those.

 

well I don't know how you guys are getting that kind of mileage my 14 is getting the exact same mileage my 13 got and that is 36 with a mix of city/hwy in the flat *** state of Fl. And that is normal riding I am not flogging all the time and I run 75-80 on the interstate

 

It's important to know exactly how many miles you have traveled between fill-ups. Until you verify the accuracy of your odometer, your mileage calculations can be incorrect, usually inflated. I think the new 14s may very well have good speedometers, within 1 mph of actual speed. That would mean that the odo would also yield a relatively accurate total miles driven. If so, all good.

But, if your speedometer reads 60 and you are only traveling 56 according to the gps you have mounted on the bike, then you have a 7.1% discrepancy in miles indicated versus actual gps miles traveled. So, on a tank your odo says you traveled 220 miles. Let's say you put 5 gallons in the bike at fillup. Based on this, you would think you are getting 44 mpg, when in reality you only traveled 204 miles with a real fuel economy of 40.8 mpg. So in this example there is a 3 mpg swing depending on the circumstances. YMMV

I know this may seem insignificant and maybe unimportant, but it's reality with most motorcycles.