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Thread: Gas cap rubber piece

  1. #1
    Registered User ratze's Avatar
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    Gas cap rubber piece

    Ok folks, i know this is proabally a dum question. how do i get more fuel in my 09gs.
    The pursuit of reality at all cost.

  2. #2
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    Ratze - do you mean how do you get around the fact that the nozzle shuts off when the fuel level gets to the bottom of the plastic fill neck in your tank, leaving an air space about 4" tall that "should" be filled with fuel?

    Consensus seems to be that restricting the fuel level to the bottom of the filler neck allows expansion room when the fuel gets hot. Some folks take that neck out, drill a couple of holes in it near the top, and then reinsert. Some folks cut it off completely. I just trickle in more fuel after it shuts down, which is a pain to do with the vapor recovery nozzles. I only do this just before I head out onto the road so expansion while sitting isn't a problem.

    You can get at most about another half gallon, more usually 0.2-0.3 gal. Question whether you really need that or not. But., 0.3 gallons is another 12-15 miles range, so ...

    JayJay
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    '09 R1200 RT, '73 R75/5 Toaster (under rehabilitation)
    Lots of rice burners in the past ...

  3. #3
    Registered User ratze's Avatar
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    Yea, thats exactly what i was refering to. if its only 15 to 20 miles i wont fuss with it, i thought it was like a gallon or 40 to 50 miles. thanks
    The pursuit of reality at all cost.

  4. #4
    Put nozzle in tank. Fill until it shuts off. IFF the pump isn't one with full on/full off triggers you can then lift the nozzle a few inches and slowly add about 0.4~0.5 additional gallons. The key is going slow so you don't splash fuel in your face! You might have to add the fuel in short spurts.

    Doing that I was able to put in over 5 gallons on a few fill ups where the "miles remaining" odometer said I had single digits to empty. That is pretty close to the theoretical tank size.

    There are modifications that can be made, however they don't really get you additional fuel storage. They may let you fill available fuel space faster. If you need more fuel add an aux tank or carry fuel bottles.

  5. #5
    Registered User lkchris's Avatar
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    Boy the list just gets longer and longer of potential owner modifications that disqualify purchasing a particular used bike. Or merit a hefty discount.
    Kent Christensen
    21482
    '12 R1200RT, '02 R1100S, '84 R80G/S

  6. #6
    Quote Originally Posted by lkchris View Post
    Boy the list just gets longer and longer of potential owner modifications that disqualify purchasing a particular used bike. Or merit a hefty discount.
    Point well taken, but in this case nothing compels an owner to keep adding fuel after reaching the bottom of the restrictor. You can stop adding fuel any time it suits your fancy.

    Sometimes I just get sick of BMW thinking they are my nanny.
    Paul Glaves - "Big Bend", Texas U.S.A
    "The greatest challenge to any thinker is stating the problem in a way that will allow a solution." - Bertrand Russell
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  7. #7
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    .35 gal

    Riding with others who hadn't modified tank I like the extra 0.35 gallons I have. On the Alaska Highway I rode with someone who hadn't modified his and he was getting nervous. Some gas stations found by my Garmin weren't there anymore.(I carried extra gas most of the trip but had emptied the containers on the way back.) Remove rubber neck thingy gets a bit more. Drill small hole in neck. Total, as near as I can figure is about 0.35 gallon additional. If it meant the difference between making it to a gas station and walking 12 miles, or even 5, in riding boots?

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