Auxiliary sidetank project for BMW Xchallenge

Discussion in 'Vendors' started by Max Kool, Nov 9, 2007.

  1. Max Kool

    Max Kool Xtankteam™

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    Hi all,

    as some of you may know I am an Xchallenge enthousiast. I only use the bike for rally like riding. Long days riding offroad going where my road book (or gps) takes me.

    [​IMG]

    Although fuel consumption is very low on the little Beemer, you'd still wish for a few extra liters. When I saw a picture of the Spanish "Equipo BMW Dakar 2008" I knew I had to have a sidetank like that.

    [​IMG]

    [​IMG]

    This one seems to be fabricated by Mecasystem, a French specialist in rally convensions on (mostly) Yamaha WR450F. They don't come cheap at 580 Euros, and very hard to get by. I met a guy who's going to do his second Dakar this coming winter on his WR450F, and he told me these tanks are not being sold seperately. He wanted to have them on his own bike.

    Anyway, so far for my intro. I decided to contact a friend of mine and ask him politely if "we" :wink: could make something like this. He is a professional welder working with alloys and stainless steel. Normally he welds stuff like exhaust headers and inlet manifolds for Prodrive Subarus. So I knew he would be my man. He said he will make me a tank, but he rather turned this into a "product" so as to keep the costs down. He want to make a smal series of these sidetanks.

    Ok, about the tank now. The shape of the tank will be much like the one in the picture, however it will be specifically made to fit the Xchallenge. it will be a straight bolt on that does not require extra lugs, or welding to the subframe. Mounted to the Xchallenge it will look somewhat like this:

    [​IMG]

    [​IMG]

    One potential customer said he wants a few (he's a BMW dealer), but only if it contains at least 5 liters. So it will at least have a capacity of 5 liters. :D The tank will be made of 2,5 mm sheet aluminium and will come with mounting hardware that should resist offroad and rally use of the bike. I am primarily asking fellow European Xchallenge riders if they are interested in a tank like this. For riders overseas shipping, taxes and the Euro might be too steep. The price of the fuel tank has not been set, and is depending on the amount that will be sold.

    Who wants one?

    If you are seriously interested please email or PM me. I will collect your emails and keep you posted. As mentioned, I'd like to hear from European people first for shipping is not that expensive, and there are no taxes to pay.

    Kind regards,

    Max Kool
    #1
  2. GSL

    GSL Team Big Wheel

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    Max,

    I am most definitely interested in one of these. I can arrange the purchase through a Bruxelles, Belgium, friend of mine, if that will help.

    This solution looks to be most excellent!

    Will
    Woodland Park, CO, USA
    #2
  3. eombbear

    eombbear RIMslayer

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    I built a 3/4 gallon Middle Tank for a Husaberg a few years ago . It was under the seat so a filler cap didn't seem like a good thing to have .

    So I welded in a thick block of aluminium at the rear and drilled and tapped it for a 1/8" pipe size and installed a brass hose fitting as a vent .

    Routed the hose under the seat and tank and up to the handlebars (Kawa KDX200 had a plastic clip-on hose/handlebar fitting but a zip-tie and a fuel filter at the handlebars would do as well) .

    Mounted an inline PetCock and tee (w/hoses) to the existing fuel line , opened the PetCock when I filled the bike up (filling the MiddleTank), then closed the PetCock to keep the fuel in the MiddleTank until I needed reserve ,open the PetCock and the fuel would equalize into the carb and Main Tank.

    It worked perfect with no "sucking air" or any other negatives .
    #3
  4. Max Kool

    Max Kool Xtankteam™

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    Through Bruxelles will be excellent. No taxes, low P&P.

    I'll post all uodates in this thread, and contact you when we have an estimate on the price ok?

    Max
    #4
  5. GSL

    GSL Team Big Wheel

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    Sounds good! :thumb
    #5
  6. Steady

    Steady Flogster

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    Max

    Unable to see a pic of your design? Put me on your list please.

    Steady
    #6
  7. Max Kool

    Max Kool Xtankteam™

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    Hggr, imageshack troubles. :becca

    I updated the startpost.
    #7
  8. Ciampa

    Ciampa Long timer

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    May 23, 2006
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    480
    Location:
    San Francisco, CA
    Did you custom build the mount for your roadbook holder/electronics? Can you post a pick of your set-up? I'm trying to get my bike set up for the Sand Blast Rally in SC. Also what tires have you been using? I have been using the Deserts but I'm thinking of trying something new like the MT-21s?

    Thanks,
    -Ciampa
    #8
  9. Max Kool

    Max Kool Xtankteam™

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    Hi Ciampa,

    Here's some pics of the roadbook holder:

    [​IMG]

    [​IMG]

    You should however reinforce it with two L-beams, for otherwise it will crack. I glued two beams to the underside like this:

    [​IMG]

    Hope this helps getting some inspiration.

    Tires. I have become a great fan of the Michelin Bajas. at the rear Bajas only, at the front Enduro Comp MS or Baja. They are tough enough for rocks and stones and offer plenty grip (for me) in muddy stuff. I have the feeling the Bajas are better for a middle weight bike than the real enduro tires (which are lighter and wear quicker).
    on the road they steer "normal" and don't induce some sort of weave at high speed like the Enduro III does for instance.
    #9
  10. X-Rated

    X-Rated Been here awhile

    Joined:
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    Jervis Bay, South Coast NSW. (Australia)
    Max - I'm definitely interested, if the price is reasonable. I can cover shipping to Australia. I presume that this is going to be removable very quickly? I would only intend to mount and fill this tank when I need the extra range.

    Please add me to the list.

    Al
    #10
  11. Max Kool

    Max Kool Xtankteam™

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    I am thinking of the same thing. Four or five bolts and it's off. I dont plan on making a permanent connection to the main tank (yet). I'll carry a fuel hose so I can syphon it to the main tank in case of an emergency.

    Max
    #11
  12. SteveRed

    SteveRed Adventure Moto

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    Hi Max.. I am also interested in the tank for Australia. I know shipping from Germany is not too expensive as i often get product from Ilmberger or Boxer Design. Also my wifes parents live in Dresden and they sometimes ship to OZ. Here there is not sales or import tax on motorcycle products, only a 10% VAT or GST if the total cost is over $1000 AUD as invoiced including shipping from your end. Can you please keep me posted. Thanks

    Steve
    #12
  13. beefjerky

    beefjerky Long timer

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    Hey Max. I'd buy one of those off of ya. What kind of $ are we talking?
    #13
  14. Max Kool

    Max Kool Xtankteam™

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    I don't know yet. Price is depending on the design, and how many people will join. So at the moment we're in a catch22 situation. Let's wait and see ok? We don't want to cut corners either with poor design to deliberately make the tank too cheap.
    #14
  15. Metteke

    Metteke Beemer beat in me

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    any progress max?

    Xmas time is coming, so I get paid a bit more next month... time to spend...:deal
    #15
  16. Max Kool

    Max Kool Xtankteam™

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    I'm bringing my bike to the workshop next week, so we can fit it and make sure it clears the rear wheel, chain, etc.

    We are thinking of using a standpipe for the fuel tap on the top of the tank and connect that to the vacuum line that is already under the seat. Nice and clean but we want to make sure that idea is going to work (ergo: this works if the BMW gas tank cap is really 100% tight, which I think it is).

    Please hold your breath another week or two when we can present the first prototype hopefully.
    #16
  17. SteveRed

    SteveRed Adventure Moto

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    I will take delivery of one of the Safari/Aqualine test tanks next week developed for Touratech for the G650X. This will give me up to 25 litres (6.6 USGAL). These are the same tanks as the Touratech jobbies but without the BMW logo etc. I will see how I feel with the thing in front of me... You certainly only have to put in the fuel you know you will need to use and not fill it to the top every time!
    #17
  18. beefjerky

    beefjerky Long timer

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    Ask the guys at aqualine if they'll send one over here for me
    #18
  19. Lobby

    Lobby Viel Spass, Vato!

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    Max,

    Super idea. I just saw that Touratech is selling a larger tank for the XChallenge and wondered, again, why these options aren't stock.

    I'm moving this thread to Vendors, as it will get a closer look over there.
    #19
  20. GB

    GB . Administrator

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    Interested to see what you come up with :thumb

    :lurk
    #20