Husaberg 70 Degree Owners Thread!

Discussion in 'Thumpers' started by KayaKTM, Nov 22, 2010.

  1. cyborg

    cyborg Potius Sero Quam Numquam

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    That's correct, both the OEM plastic subframe and the 70-degree tanks are cross-linked polyethylene. Polyethylene is a notoriously difficult material to glue/seal to. That's why you usually have to use mechanical means: molded-in inserts, molded threads, or bulkhead seal plugs to fill smooth edge holes, or rubber sealed bulkhead style fittings to create a fuel tap. Quite a bit of work I would guess.

    I still have my OEM subframe which I am keeping as a backup for my 70-degree tank. The EOM subframe looks like it would hold quite a bit less than the 70-degree tank, but it's hard to tell accurately.

    Cross-linked polyethylene and polyethylene in general can easily handle any type of fuel (gasoline, ethanol, diesel...), that's why they make gas cans out of it.
  2. Cruz

    Cruz Lost but laughing.

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    It looks like it would hold around 3 litres, maybe a little bit more, when you put them side by side. That is without knowing the thicknesses of each tank.
  3. UngaWunga

    UngaWunga Mosquito bait

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    When you get a chance, fill it with water and find out?

    As for the Coswell stuff, I might not be remembering what they used. I'll find out. Should help seal any plugs as well.
  4. waldecker

    waldecker Been here awhile

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    Hi,

    When Garry's team built the first 570 rallye bike they had to pioneer the tank solutions;It was described in this thread:
    http://www.advrider.com/forums/showthread.php?t=416713.
    For the subtank they used brass spigots that were threaded/glued into the base of the subframe as well as the rear of the main tank (they didn't drill through the fuel pump housing as later conversions do).
    Both locations don't provide much "meat" in the plastic for thread so when I got the bike they had been repaired with teflon tape and glue, but neither lasted past the first few rides and had to be abandoned.
    I still use the subframe (without fuel in it) and a skilled plastic welder sealed the holes in the main tank; to connect the Safari Tanks(front and rear) I then bought the fuel tap block that goes through the fuel pump housing and all is well.
    Cheers waldecker
  5. Shawnee Bill

    Shawnee Bill Long timer

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    Thanks for the followup explanation.

    Pass throughs and plugs in polyethylene are doable with bulkhead fittings and proper o-rings/gaskets. A little dab of gas resistant lube on the gasket to allow it to stretch and seat. Even saying that those type of fittings must be monitored and resealed from time to time or they will seep some.

    Or as waldecker says an expert plastic welder can weld polyethylene.


    .
  6. SRG

    SRG SRG

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    I was just looking at the fuel tank and subframe of my '10 FX450. The plastics look identical. Same battleship grey color. Reckon they are the same?
  7. Blakduk

    Blakduk Just trying to get by.

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    Funny how this single thread gets more posts than the entire UHE.
  8. SmileyRider

    SmileyRider With lots of Teeth

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    What is the UHE?

    Please bare with me, i'm new
  9. frostyuk

    frostyuk Been here awhile

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    for those with the force rally bash plate or stephans for that matter, how wide are these ? do they impact the bikes manouverability in the tight stuff as a result? do they add more protection re the brake/gear levers ? do you lose any ground clearance? just wondering from the perspective that i had an enduro engineering guard on my clutch slave unit and noticed a chunk taken out of it, don't know where or when it was done

    thanks
  10. SRG

    SRG SRG

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  11. Baja Dad

    Baja Dad Long timer

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    That is because we are NUTS !!!!!
    and we love our BERGS
  12. SmileyRider

    SmileyRider With lots of Teeth

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    So I have removed my subframe and I have already found a small issue.

    [​IMG]

    If you can see in the picture, there are two holes near the top of the subframe. They are not threaded and they actually go inside.

    They will definitely leak or allow crud into the tank. It doesnt look like there is enough thickness to thread something in there. But I figure I will give it a shot.

    Has anyone else gotten this far yet?

    I may try to find a plastic welder and see if they can seal it up
  13. Xmoto

    Xmoto Death Race

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    Try these. Insert them wet with fuel tank sealer. http://www.rivetsinstock.com/rivet-nuts-threaded-inserts.html?gclid=CJ7al5TjnbUCFU-d4Aod2hoASw
  14. Seth S

    Seth S Will _____ for _____

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    I see at least 6 more problems that you will have to deal with
  15. SmileyRider

    SmileyRider With lots of Teeth

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    A quick update from tonight. I filled the tank with water and it is not water tight. One seam had a steady stream of water coming out of it and a bolt hole leaked.
    That being said I did manage to fill it up with water and definitely got over a gallon of water in there. I pulled out out 3.8 litres with a bit of spillage not accounted for. So my guess is that this thing would easily yield 3.5 litres or just shy of a gallon of usable fuel if plumed correctly.
    I am contacting a local plastic welder and if the rates are cheap enough I will continue with this venture. Otherwise theres a guy locally selling a 70 degree tank.
  16. Seth S

    Seth S Will _____ for _____

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    I have a suggestion to consider. Drill a decent sized hole in a place that makes the most sense on top of the tank and fit a fuel bladder to the inside. Then run your lines as needed and don't worry about trying to seal the tank.
  17. SmileyRider

    SmileyRider With lots of Teeth

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    My only concern is that the hole might be quite large and take away from the structural strength of the subframe.
  18. Seth S

    Seth S Will _____ for _____

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    you could cap it with a reinforcing aluminum plate that could double as a place to mount fuel fittings and as a filling point.
  19. BogeyMan

    BogeyMan Been here awhile

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  20. BogeyMan

    BogeyMan Been here awhile

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    I recently replaced my fuel injector due to hard-start issues and also added to little in-line filter that KTM includes in the new part.

    BUT, there's many references to this tiny little filter getting clogged up itself, so in anticipation of that eventuality, I purchased the Golan mini-filter (which is not as "mini" as the KTM inline one, but flows better and is less likely to clog).

    Image #1
    Image #2

    I know some of you have added an inline filter - so this question is for you... Whereabouts did you end up installing it? Closer to the tank or closer to the injector end? How tight is space after installing? Any helpful tips or images?