KTM 950/990 Adv UNDERSEAT TANK

Discussion in 'Crazy-Awesome almost Dakar racers (950/990cc)' started by rade, Aug 18, 2012.

  1. DirtyADV

    DirtyADV Long timer

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    Gotten over the fever at least (a while back but busy times, friends getting married and taking care of a moose after the hunt and stuff).

    Have started doing some drawings on the computer but nothing that is possible to present at the moment.

    Want to play some with a cardboard mockup but right now the oil leak I have is highest priority want to decide what to do about it (bike is in pieces right now ready to see if the cylinder head nuts are torqued properly, had to look at my dads car while bike was cooling down and by the time that was done it was to late, had to get home.

    http://www.dirtyadv.com/ktm-950-adventure-oil-leak/

    Will share my plans and stuff later on, might need help with suitable kind of aluminum and material thickness later on.

    See you have Prague as location, great city!

    /Johan
    #21
  2. rade

    rade Been here awhile

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    Hi Johan,

    I saw the pix. of your bike. That is pitty. I understand, this is priority now.
    Btw. I was talking with a friend and It would be possible to do the tank instead of the frame. Question is how much gas on top you get. It wont be more than 1-2 liters max. I will wait for your drawings.

    good luck with the repair!

    Rade

    p.s. thx. Prague is nice :-)
    #22
  3. rade

    rade Been here awhile

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    No problem to powercoat it, if anyone wish...
    #23
  4. rade

    rade Been here awhile

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    I saw you video - "killing" one enduro by one - nice job with ADV:-)
    We did similar test and no problem with the tanks. Next I want to find someone who is crazy enough to do some real jumps :-)
    #24
  5. rade

    rade Been here awhile

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    Hey,

    I decided for an innovation - to do polyethylen underseat tank!

    Now (after the back wheel clereance test) I am sure on the correct shape and the fuel cap under the seat.
    The 3D model is saying 8,5 liters volume, but in reality it will be one less I think.

    1/ I did the shape from hand, specifically thinking about the clereance for the rear wheel.

    [​IMG]

    2/ It was scanned and modified into 3D model

    [​IMG]

    3/ Prototype attrape was billed by CNC machine from styroform

    [​IMG]

    4/ Rear spring from the shock was removed to make a clereance for the rear wheel

    [​IMG]

    [​IMG]

    5/ Finally dynamic hit and max. compression confirmed the clereance

    [​IMG]

    [​IMG]

    [​IMG]

    ... and here is the trailer :-)
    http://www.youtube.com/watch?v=19234Jluh0E

    Last three things to be solved:
    a/ outflow - only spce is above the pipes...
    b/ air vent - to avoid "air pockets"
    c/ isolation of the pipes under the tank


    Guys, pls. any thoughts, comments, recos, hints before it moves to the form production? (because it is as expencive as the bike it self.)

    If all goes well the first pieces for testing will be ready in the end of Feb:-)

    Thanks!
    #25
  6. rossguzzi

    rossguzzi 990 Adv.

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    That is brilliant !

    My only thought is, was it a new tyre on the rear. Hopefully it is the biggest knobiest tyre you could find. You know cause if they clear, you should be sweet.

    Looking forward to hearing prices etc.

    Great work.
    #26
  7. Buddy_Holly

    Buddy_Holly Imminent Train Wreck

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    I'm kind of sure you have thought of this- but just in case- every tire is different by brand, and chain adjustments for stretch could effect where the wear is on this type of tank.

    Nice work on both tanks.

    BH
    #27
  8. zgfiredude

    zgfiredude Old Fart in Training.......

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    I would agree with BuddyHolly.....allowing for plenty of clearance front to rear for tire adjustments would be smart. Another suggestion would be to then reduce the overall dimension by a slight amount to allow for guaranteed fitment on all bike (would allow for KTM manufacturing variances) and perhaps to allow clearance for a Kevlar skin for further strength and abrasion resistance.

    Very cool otherwise, keep it up!
    #28
  9. MrSandman818

    MrSandman818 INaVANdownBYtheRIVER

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    two thumbs up on the concept. 2.5 gal would do nicely on the big twin. Beats pulling over and re-fueling with the roto pax! now just imagine this tank with rally tanks!
    #29
  10. DesertSurfer

    DesertSurfer Tail sprayin

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    With the talent and resources you seem to have, why not go all the way and make a full subframe that incorporates a rear tank as well as rear rally side tanks?
    #30
  11. gefr

    gefr Life is a trip

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    The seat needs some room to move slightly forward in order to "lock" under the central latches. I wanted to point out the need for this slight forward movement in order to allow the seat to lock.
    Great job. I would also like to hear the cost of such a construction.
    Cheers.
    #31
  12. rade

    rade Been here awhile

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    I tought about it :-), but this is too advanced...

    Let's see if this concept works and if yes, I will think about some solution for bikes with ABS, because the underseat works only for types w/o ABS. I have two ideas, but one by one :-)
    #32
  13. rade

    rade Been here awhile

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    Great observation:clap I found out thanks to the attrape. After mod. the locking is no prob.

    Costs? The dev. costs are not final yet, but close to the costs of the bike it self. I hope the final retail price per tank will be below $300. Itm. cheaper than any similar solutions, but above Rotopax. My intention is to make the price "no brainer" and rather sell volumes than to have high margin. Let's see :-)
    #33
  14. CMurgel

    CMurgel Been here awhile

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    I would be interested if you develop any solution for the ABS 990. I like the idea of under the seat thank. Great work!

    Carlos
    #34
  15. KTMADV

    KTMADV Hammer Down

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    Same here. Nice tank.
    #35
  16. zgfiredude

    zgfiredude Old Fart in Training.......

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    If you are at or below $300 for a final price I'd predict there would be a LONG LINE of customers ready to order one.

    I would be near the top of that list! :freaky
    #36
  17. Xtremjeepn

    Xtremjeepn Motorhead!

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    I'd tend to agree that the large tank options currently semi-available are too pricy for most. Especially when compared to the large tank options of other makes. Price point and production capacity could be a big issue here.
    #37
  18. BykBoy

    BykBoy Meshuganeh

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    Same here.:deal
    #38
  19. Dustodust

    Dustodust Long timer

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    very nice tank !
    excellent work !
    got to hand it to you :deal
    hope you can pull it off and make it worth the effort !


    one of the problems with producing any custom short run motorcycle parts for sale is that quality material costs are high and there is a LOT of time involved . Another possible problem is that with short run handcrafted items not patterned by a cad design and production molded may have what may be considered " cosmetic flaws " by customer expectations . 100's of hours can be afforded spent on pattern making , but small run production can take excesive time finishing out "flaws"

    the mass production from china or other low labor cost areas and the availability of mass machine produced items in the motorcycle/automotive market has customer expectations almost unreasonable to make it worthwhile.
    The margin of profit versus time involved in handcrafting certain items for motorcycles makes it a losing proposition for the craftsman in todays motorcycle parts market

    other genres, for instance , the custom car or boat industry, aircraft, race car items are more forgiving in terms of retail pricing

    In other words
    IMHO motorcycle riders (me included ) are a bunch of cheep spoiled bastards, we want it cheep and we want it perfect :lol3
    #39
  20. Xtremjeepn

    Xtremjeepn Motorhead!

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    ...yep:lol3. However, there are similar aftermarket tanks for other bikes that are 1/4 to 1/3 the cost of the large tanks for the big KTM...... So:evil Granted we have 2, but one would think that would only double the cost, not triple or quadruple it.
    #40