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Old November 12th, 2013, 05:41 PM   #1
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Low Fuel Light

I'm wondering what people experiences are when their low fuel light comes on. The manual says the light comes on with 1.05 gallons remaining but it seems the light comes on earlier than I'd expect.

Today, for example, after the light came on I drove 40 more miles and only put in 3.1 gallons. If I'm averaging 50 MPG, I should have put in closer to 4 gallons.

On previous occasions where the low fuel light has come on, I've only put in anywhere from 2.6 to 2.9 gallons when I filled up.

TIA,
Eric
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Old November 13th, 2013, 05:24 AM   #2
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What your seeing is fairly consistent with what others have seen.
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Old November 13th, 2013, 06:02 AM   #3
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I've driven up to 30 miles on trip fuel. I've never put more than 3.3 gal in, and I spend a while burping all the air and filling to top of neck. I average about 150 miles per tank, getting about 43 mpg.

Everything tells me I can go farther but I chicken out as I ran my past bikes dry way too often.
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Old November 15th, 2013, 03:41 PM   #4
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My fuel light lights up at 200km-215km at 12 litres. I am running average of 20km per litre.

so it seems 300km/187.5miles is doable. Leave 1 litre inside for emergency. lol
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Old November 19th, 2013, 02:00 PM   #5
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I'm pretty sure I could easily get 200 miles on a tank, but because that light comes on so soon, the pucker factor kicks in.

Has anyone gotten 200 miles/322Km on a tank without putting in 4.1 gallons/15.5 L when they finally fueled up?
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Old November 19th, 2013, 04:07 PM   #6
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I think SuperTen or Jerdog got into the 190s and put under 4 gallons back in. However, I think both these guys easily get 50+mpg, whereas I'm a consistent 43-44.

What I need is an honest unusable fuel ratio. 90% of my riding is to/from work so I always pussy out at around 150 miles; about 3.3-3.4 gallons to fill.
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Old November 20th, 2013, 10:26 AM   #7
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It's about the fuel pump

Ducati is apparently very worried about fuel pump life. If you run it dry it will burn out eventually. I get the same range and consumption that the rest have posted. Also, If you brake hard or are going down a steep grade, the light seems to come on earlier as the fuel sloshes forward.
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Old November 20th, 2013, 10:41 AM   #8
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the natural lean angles and sloshing is what worries me about getting too low. seems like most present day fuel injection systems increasingly do not like being run dry.
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Old November 21st, 2013, 06:08 AM   #9
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It's because the fuel is needed to cool the pump. Has been that way on most cars and trucks since the 1990's. I burned out the pump on the rear tank of my '94 F150 running it to empty...not that easy to replace.
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Old November 21st, 2013, 06:40 AM   #10
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just another reason that I hate fuel pumps being located inside the tank. It's difficult to replace in your garage and an external suction pump could be cooled by other means. Military aircraft use suction pumps down the line from the tanks, mostly to facilitate switchable lines but helps contain fuel system problems and maintenance, as well.

We drive a diesel so I'm hardwired not to run empty anymore.
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