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Old Feb 10, 2011 | 09:37 AM
  #11  
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here's what you do...

fill up your tank and fill up a 1 gallon gas can to strap to your bike somehow.

re-set your trip OD to 0 and take off and ride until you completely run out of gas.

read your trip OD...thats how many miles you get from full to empty.

put your 1 gallon reserve in the tank, ride to next gas station, re-fill, ride home.
 
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Old Feb 10, 2011 | 09:40 AM
  #12  
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Couple of things:

1. Forget the mileage guage. Calculate MPG by gallons in to miles driven.
2. E10 gas or other Cali gas blends destroy mpg ratings

Do nothing until you:

Add exactly 3 gallons of gas at each fill up and log mileage for 5 fill ups. Then see how far 15 gallons of gas took you. That will be your accurate mpg.
 
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Old Feb 10, 2011 | 09:41 AM
  #13  
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Originally Posted by toastman
here's what you do...

fill up your tank and fill up a 1 gallon gas can to strap to your bike somehow.

re-set your trip OD to 0 and take off and ride until you completely run out of gas.

read your trip OD...thats how many miles you get from full to empty.

put your 1 gallon reserve in the tank, ride to next gas station, re-fill, ride home.
That's a bit drastic.....
 
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Old Feb 10, 2011 | 09:42 AM
  #14  
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Originally Posted by KBFXDLI
That's a bit drastic.....
not really, plus its good to know how many miles you can squeeze out of a tank
 
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Old Feb 10, 2011 | 09:46 AM
  #15  
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Originally Posted by chi45cken
Hey Joe - it's suppose to be 4.5 tank, but even when I am at less than 7 miles left to ride (the alert you get on your speedo) I can never put more than 3.5- 3.6 gallons in. How come? I used to get approx. 150 miles out of a tank, it's gotten worse recently. Should I get it dyno tuned by a professional?
That's the same problem I have on mine. I can only get 3.5 or so into a 5+ gallon tank. I think it has something to do with the reserve tank that's why I asked if you have one.
 
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Old Feb 10, 2011 | 10:00 AM
  #16  
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How does adding EXACTLY 3 gallons of gas at each fill up for five times tell you ANYTHING? What if you use MORE than 3 gallons between fill ups? What if you use LESS? If the tank holds 4.5 gallons, thats a gallon and a half of possible error at each fill up!
 
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Old Feb 10, 2011 | 10:14 AM
  #17  
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There is no such thing as a "reserve tank."

The reserve position is merely a function of the petcock, which is not found on EFI bikes, I believe. I have a carb, which I like.
 
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Old Feb 10, 2011 | 01:11 PM
  #18  
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Guys, I don't have a tank lift - tho I was considering getting one from Jackyl..

I realize that doing all the performance mods would change the mileage but damn... I went from riding close to 170 on one tank to around 140 and recently it dropped to 110.. I will try to test it out and let ya know. I also wonder about that 'reserve' deal.. If when I fill it up and it fits only 3.5 does it mean that there's a gallon still in that I'm actually not using?
I fill up with 98 Octane - whatever is suppose to be the best according to my dealer..
 
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Old Feb 10, 2011 | 02:20 PM
  #19  
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Originally Posted by chi45cken
Guys, I don't have a tank lift - tho I was considering getting one from Jackyl..

I realize that doing all the performance mods would change the mileage but damn... I went from riding close to 170 on one tank to around 140 and recently it dropped to 110.. I will try to test it out and let ya know. I also wonder about that 'reserve' deal.. If when I fill it up and it fits only 3.5 does it mean that there's a gallon still in that I'm actually not using?
I fill up with 98 Octane - whatever is suppose to be the best according to my dealer..
carbed bikes have a reserve feature. no gas gauges, so when you start running out of gas, you just turn the petcock from on to reserve so you can get to a gas station. and if you have a 4.5 gallon tank, and it only takes 3.5 to fill it..................here's your sign.

where in the hell do you get 98 octane?! best we have around here is 93
 
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Old Feb 10, 2011 | 02:29 PM
  #20  
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Originally Posted by chi45cken
I have a 2010 Bob with PCIII, Python 2-1 and stage 1 SE A/C... I fill up the tank and it says I have 190 miles left (on full).. I end up getting around 110 miles on a full tank. WTH? Do you have any idea as to what I should do to increase the miles?
Your fuel guage must be out, leaving a gallon left in the tank when it says empty. Any way of going for a ride and taking some spare fuel in a container strapped to the back or something. Then you could ride it until it runs out and see what the true tank range is.

Even with a tank lift I would imagine that you could fill it up to the top, but could throw the guages out.
 
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