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43l large fuel tank K75

Discussion in 'Road Warriors' started by mudbreeder, Feb 17, 2008.

  1. mudbreeder

    mudbreeder Adventurer

    Joined:
    Mar 10, 2007
    Oddometer:
    99
    Location:
    belgium
    homemade 43l tank on BMW K75 max 70cm wide, what do you think ?
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    #1
  2. notarex

    notarex Can U taste the waste?

    Joined:
    Sep 12, 2006
    Oddometer:
    1,214
    Location:
    CT
    "You plan to take the gasoline out of the wasteland. You sent out two scouts to find a vehicle, a rig big enough to haul that fat tank of gas. What a puny plan..."
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    #2
  3. waynemnabc

    waynemnabc Adventurer

    Joined:
    Jan 28, 2008
    Oddometer:
    17
    Well done Mudbreeder, nothing annoys me more than motorcycles with small fuel tanks. I hate having to plan my road trips based on where I can find gas stations. Looks like you have a nice inventory of machinery and tools. Now just get it sprayed and shiny so it can look pretty. Is the right side a reserve tank or did you just punch through the original tank?
    #3
  4. mudbreeder

    mudbreeder Adventurer

    Joined:
    Mar 10, 2007
    Oddometer:
    99
    Location:
    belgium
    in fact there are 3 separate parts, the side tanks are welded to the original tank, below the top welding are some holes for the air to pass through and fill up, on the bottom they are connected with tubes so i can shut 1 or 2 parts off if i should fall and have a leak, the fuell pump can be mounted in 2 positions
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    I'll add some pictures from the start:
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    #4
  5. noelm

    noelm Been here awhile

    Joined:
    Feb 20, 2007
    Oddometer:
    246
    Location:
    Perth Western Australia
    Great work so far - don't forget to show us the finished product.
    #5
  6. WnRn

    WnRn Left right out

    Joined:
    Nov 22, 2007
    Oddometer:
    1,052
    Location:
    Over there!
    Did you add any baffles inside to help strengthen the tank??? Also this will help it retain its shape when it expands and contracts due to heat and cold. This in turn will help stop the welds from cracking.
    #6
  7. err

    err Been here awhile

    Joined:
    Dec 23, 2007
    Oddometer:
    223
    thats awesome
    #7
  8. Cat0020

    Cat0020 El cheapo

    Joined:
    May 1, 2002
    Oddometer:
    6,593
    Location:
    NW of Philly, Hoboken, Brooklyn.
    Might want to research how much stress that 43 liter of fuel would add to the frame of your K75.. though I've never head of a K75 frame failure..
    #8
  9. McB

    McB Joe 40 ouncer

    Joined:
    Apr 8, 2005
    Oddometer:
    15,496
    Location:
    North Slope of the Flint Hills
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    Bet you could sell wooden ones to the KLR guys. :lol3
    #9
  10. Spacerat

    Spacerat I worry about my apathy.

    Joined:
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    Oddometer:
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    Somewhere, I think
    I think if I had the shop skills you have I'd do the same. Anything to give a bike longer legs.
    #10
  11. twinrider

    twinrider Pass the catnip

    Joined:
    Aug 20, 2002
    Oddometer:
    17,311
    Location:
    日本
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    Very cool tank but why did you line the inside with wood? :confused
    #11
  12. err

    err Been here awhile

    Joined:
    Dec 23, 2007
    Oddometer:
    223
    hahahahahah
    #12
  13. waynemnabc

    waynemnabc Adventurer

    Joined:
    Jan 28, 2008
    Oddometer:
    17
    You're fabrication skills are awesome, I would never have thought to use wood to layout the tank. Were do you find such large chunks in the first place?
    I don't think you'll have any problems with the added weight to the frame. Those older steel frames are way stronger than the forged aluminum of todays bikes even though they are designed to hold two adults and cargo.
    Good on you also for thinking out the plan for safety reason, shut off valves.
    I definately see a market for what you're doing, especially for us long distance riders.
    Send us the finished product so the Corporate Majority can also appreciate what you have done, shiny and pretty.
    #13
  14. mudbreeder

    mudbreeder Adventurer

    Joined:
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    Oddometer:
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    belgium
    if you look close you can see that it exists of multiple chunks of wood, glued together (no nails or screws makes it easier to cut it)
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    #14
  15. mudbreeder

    mudbreeder Adventurer

    Joined:
    Mar 10, 2007
    Oddometer:
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    went out for a test ride, works just fine. now i need to finish some details and ride it
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    #15
  16. El Guero

    El Guero Long timer

    Joined:
    May 8, 2007
    Oddometer:
    9,727
    Location:
    Iowa
    You know somebody is going to spot that thing and put pictures online, and some BMW forum is going to spend two weeks classifying some missing-link Dakar K-bike :lol3

    Looks good! :thumb
    #16
  17. bill pierce

    bill pierce I don't wana pickle

    Joined:
    Mar 17, 2007
    Oddometer:
    741
    Location:
    Rockford, Wa
    Good work! Now you've done it though, you are going to have to wash the bike.
    #17
  18. acejones

    acejones Long timer

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    MS. Gulf Coast and Puerto Vallarta, MX
    VERY nice work !
    #18
  19. waynemnabc

    waynemnabc Adventurer

    Joined:
    Jan 28, 2008
    Oddometer:
    17
    It looks awesome!!:clap :clap :clap
    practical, looks pretty. send pics to BMW and other manufacturers, they may have a consulting job for you.
    Think your going to have to update the rest of the bike with some polish and elbow grease.:D :D
    #19
  20. Gobnobber

    Gobnobber Adventurer

    Joined:
    Jan 12, 2007
    Oddometer:
    94
    Nice work , how much extra mileage did you get from that fab ?
    #20