Motorcycle Club » The Yamaha Shop Talk

Ran out of fuel-should have had gas left???

23 posts from 11 voices
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  1. dveag29
    #

    Ok, ran out of fuel today riding home. The spec for the V-Star 950 is 4.4 US gallons for total capacity with .79 US gallons used as fuel reserve.

    Here is my problem. I ran out of fuel today, bike started surging then died. Looked in the gas tank, and sure enough, it was dry.

    I got lucky and was able to get about a cup of fuel from a homeowner nearby and drove straight to a gas station (about a mile away).

    I filled it up and it took just 2.8 gallons of fuel. Something just doesn't add up. Theoretically it should take me about 3.5 gallons to fill up once I hit the reserve. So either I am A) Crazy B) The gas pump is waaaay off C) The spec from Yamaha is off or D)

    Is the fuel capacity spec theoretical, since you can never truly fill a bike gas tank due to it's shape?? That's would be a 1.6 gallon difference. I would think they would spec actual capacity.

    Any ideas as to the fuel capacity discrepancy?

  2. chitter4
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    Something doesn’t sound right, the tank wouldn’t be off that far from spec, and if the gas pump is off that bad the station won’t be in business that long.

  3. fazdmaxim63
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    just guessing but you should get a couple hundred miles right? if so then run 100 (to be on the safe side) then fill up and figure gas mileage just to see how close or far off you really are from the specs. i think you should get at least 40-45 maybe?

  4. dveag29
    #

    just guessing but you should get a couple hundred miles right? if so then run 100 (to be on the safe side) then fill up and figure gas mileage just to see how close or far off you really are from the specs. i think you should get at least 40-45 maybe?

    Well this has less to do with MPG than it does actual capacity. It should take more than 2.8 gallons to fill up a bone dry 4.4 gallon tank. Unless, of course, the spec is actually referring to the actual tank volume rather than actual gas volume.

  5. akend5
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    This might be obvious, but did you stick the nozzle in and just wait for the pump to stop? Or did you tilt the bike up and slowly let the fuel come up to the cap level? A lot of times they'll stop sooner than they're full. And even then once it looks like its up to full the level usually drops little by little as you sort of pump on, pump off, pump on, pump off in spurts.
    Maybe?

  6. dveag29
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    This might be obvious, but did you stick the nozzle in and just wait for the pump to stop? Or did you tilt the bike up and slowly let the fuel come up to the cap level? A lot of times they'll stop sooner than they're full. And even then once it looks like its up to full the level usually drops little by little as you sort of pump on, pump off, pump on, pump off in spurts.Maybe?

    Well, just went out and checked it, and the fuel comes just above the fuel filler tube. So, it's as full as it can be. I generally put the nozzle all the way in and fill til it clicks off, them I pull the nozzle out and continue to fill to the bottom of the filler tube. So, something is surely off.

  7. tunc
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    ok i have not seen the bike live aint got em yet but do they have a crossover fuel pipe underneath
    some of the older yams 80s i had 1 had a deep tank straddlin the frame and needed it to get all the fuel over to the petcock side
    i removed my tank once and reinstallin it pinched the pipe so only got half me fuel
    like i sad not seen 1 yet
    sounds wierd to only get that much fuel in when specs say otherwise
    hope u sort it

  8. zcookiewzdar
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    i think that 4.4 is the actual capacity of the tank, but with the filler neck you lose some of that capacity.you could do the filler neck mod and squeeze in a little more fuel. now the question i have is when you switched to reserve why didnt you find a gas station? just curious.

  9. dveag29
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    i think that 4.4 is the actual capacity of the tank, but with the filler neck you lose some of that capacity.you could do the filler neck mod and squeeze in a little more fuel. now the question i have is when you switched to reserve why didnt you find a gas station? just curious.

    Well, my low fuel light generally comes on at 120-125 miles. This time it came on at 95, so I figured it must be off. I figured that I should have over a gallon of fuel left. I was actually going to get gas before I got home.

    Do you think that there would be 1.6 gallons of dead space in the tank? Seems excessive.

  10. matcruser
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    I suspect it's something similar to what tunc suggested. I doubt you find a crossover tube but you probably have two fuel outlets, one on each side of the tank. Perhaps the one opposite the filler cap side is kinked, plugged or turned off. If your low fuel light comes on early again, stop the bike and look / listen in the gas tank as you shake the bike from side to side. You may have a bunch of gas on one side of the tank. Did this happen after riding on the freeway for a long time? Riding straight for many miles would not allow the gas to splash from one side to the other so it would run out faster if one side is plugged. Keep us posted on the fix.

  11. dveag29
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    Well, took it in for the 600 mile service and the techs were not much help. My 950 is only the second one to come in for any type of service (the other was also the 600 mile).

    They did mention (and I forgot completely) that the fuel pump is in the tank and it can displace as much as half a gallon(and judging by the fuel pump I pulled from my Yamaha FZ6 I can certainly see that). But, still leaves about 1 gallon "missing". They said to run it again to empty and fill it up again and see what I come up with. He did say, also, that Yamaha generally lists actual fuel capacity rather than tank capacity, so that's no help.

  12. Suzhipiger
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    I realize the bike is injected, but is there no "reserve" position on the tank?

  13. dveag29
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    I realize the bike is injected, but is there no "reserve" position on the tank?
    There is nothing physically on the bike to switch to reserve like some bikes have.

    I just went out to put her up and I had a look underneath the tank and I have a hard time wondering where 4.4 gallons could possibly go. The fuel pump is located on the left side towards the front of the tank (sitting on the bike).

    If all I can go before hitting reserve is about 125 - 140 miles that's not a big deal (that means I'm getting almost 50mpg), I just wish I knew what the actual fuel capacity was so I can figure out if there is a problem or not.

    When your expecting to put in at least 4 gallons but barely make less than 3 fit, it makes ya wonder!

  14. MigejCojode
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    Most bikes it's a good rule of thumb to ride no more than 2 hours then stop for gas anyway. I know I want off for a smoke by then (one of the only times I wish I rode with a shield. That usually translates into about 120 miles or 200 kms at highway speed. Same comes into play for short hops:120 miles then get gas. Some of the olderbikes like Sushi's XJ or a buddy's intruder, don't even get that.

  15. tunc
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    still a stupid Q but if the fuel pumps on the l/h side --(inside)hows the fuel from r/h side gettin over there to it
    just seems such a big variation in capacity figures
    1.4 gallons is a lot

  16. chitter4
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    If it is like the raider it has a secondary tank under the seat, the hose that runs to it may be partially kinked. That would make it run out before the primary tank is completely empty, just something to check. There isn’t a parts blowup on the Mama Yamaha site you will have to check your bike to see.

  17. yohpren
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    I wonder if 4.4 gallons is with the bike upright and not on its side stand. That my be the difference.

  18. tunc
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    another thought if the pump is l/h inside would there maybe a hose on it internaly goin over to the r/h side and maybe not connected or disconnected

  19. dveag29
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    If it is like the raider it has a secondary tank under the seat, the hose that runs to it may be partially kinked. That would make it run out before the primary tank is completely empty, just something to check. There isn’t a parts blowup on the Mama Yamaha site you will have to check your bike to see.
    No secondary tank. I checked for possible kinked lines, but it seems there is only line exiting the fuel pump to the injectors. But, it's very crowded under there so I could be mistaken.

    I may drain the tank so that I can be 100% sure it's empty then try and fill it with 4.4 gallons and see how far I get.

    Hopefully some exploded view diagrams will be available at places like ronayers.com soon. That would help explain where all those hoses are going.

    Quote:
    another thought if the pump is l/h inside would there maybe a hose on it internaly goin over to the r/h side and maybe not connected or disconnected

    I don't think getting fuel from the right side is a problem as the tank looked and sounded dry.

  20. tunc
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    okie dokie just chuckin suggestions hope you get it figured dveag29

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