KTM 640 Adventure Rally Type Skid Plate

Discussion in 'Thumpers' started by b737jets, May 29, 2013.

  1. b737jets

    b737jets Baja Explorer

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    No problem big daddy... I should have mine finished and done in a couple of weeks I will post the final product pics and fitment and create a vendor post for the skid plates with all the details and the pricing.

    You and JoRazr are the first on the list
    #21
  2. b737jets

    b737jets Baja Explorer

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    Well all is that is left to weld it and make a few minor adjustments and radius a few corners after I weld it I will file the top of the boxes level and and install the dzus fasteners


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    #22
  3. jrozar

    jrozar Been here awhile

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    Looking Great! In line :)
    #23
  4. meat popsicle

    meat popsicle Ignostic

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    A thought occurred to me while looking at your prototype: they look sharp on the edges, meaning that they are more apt to catch on things in a slide than those designed for the 660R bikes:

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    Maybe a bit of rounding would help improve their ability to survive a low-side slide.
    #24
  5. b737jets

    b737jets Baja Explorer

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    Yeap i agree with rounded edges but I'm not a sheet metal guru maybe down the road.. But honestly I think even if you rounded the edges it won't make a difference it still gonna smash the hell out of the side boxes it will just be added labor to fab it. I may weld a curved doubler on the leading edge to help a bit but don't want to make it so ridged that it transmit its full energy to the engine side case and breaks it cause the side boxes won't give. The optimum would be a composite type plate like the 660 with the boxes. It was a side project to see if I could do it and learned a few tricks from the structure guys at work since I'm an avionics and engine guy

    So the moral to the story is don't crash lol
    #25
  6. meat popsicle

    meat popsicle Ignostic

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    Sounds like you're thinkin'bout the issues I know of:

    - a rounded edge is more likely to slide than catch, but a bugger to design/manufacturer.

    - over-engineered parts can cause issues. Cars may crumple like tin cans now, but that is by design to protect the occupants. And you have a competing goal of trying to protect the tank/petcock; sufficient structural integrity but not too much... a balancing act!

    ps - my bro's a mechanical engineer at Boeing :beer
    #26
  7. Pete640

    Pete640 Long timer

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    That's why the Rallye guys are making them outa CF. allows for complex curves relatively easily whereas alu is a PITA.
    Have a look at the KTM 640 Rallye bashies. Rock solid and weighed a tonne but did the job
    #27
  8. 9Toes

    9Toes Adventurer

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    b737,

    Yes, made up a near exact template as yourself, aluminium as yours with mate who can weld. Ran in Tuareg Rallye, wiped out several times and box sections saved the bike, remained intact but twisted. Tool kit and water held throughout race.

    Good design and cost effective.
    #28
  9. meat popsicle

    meat popsicle Ignostic

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    I remember finding a price on the 2-part 660R skidplate (two layers) - close to two grand as I recall...
    #29
  10. hondahawkrider

    hondahawkrider DAMN Rider/Motardian

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    $2k yikes...

    I thought 650+ to 899 was expensive and that doesn't cover getting it shipped to your door

    http://www.adventuremotorcycleparts.com/product/TTLMSR-04-009-100.html
    http://www.dualsportplus.ca/KTM/guards-stands/skid_plate.html


    B737,

    I think your doing a great job.. I've been using what I see here as a learning experience.. I need a skidplate, but unfortunately pretty much every thing available wont fit my bike.. I have a 620 EGS adventure, and I have the low pipes where the exhaust runs down the LHS.. The OEM offers some protection, but not as I'd like (and it was a bitch to find one)... So I have to make my own.. So, I'm using these posts as a bit of a guide....:clap
    #30
  11. meat popsicle

    meat popsicle Ignostic

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    Here's a link to an old thread discussing this topic. I had gathered up a bunch of pictures including one very curvy Al rallye-type skidplate from Europe:

    http://www.advrider.com/forums/showthread.php?t=74364&page=2

    Loadedagain (aka Stenhouse Racing) assured us it couldn't be built for under $500, so curvy must be difficult as y'all say.
    #31
  12. Pete640

    Pete640 Long timer

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    Depending on toolboxes the 690 rfr part can be had for 1/2 that in the aftermarket world. Genuine is another matter altogether!!!
    #32
  13. overlandr

    overlandr Dystopist

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    Good luck with this. I always thought there's mileage in using the dead space in front of the rallye guard sump plate skid thingy whatsit bob. Most of us aren't likely to be heaving our 640s over giant rocks but are wanting to keep heavy things like batteries etc down low.

    Walter has the right sort of idea - his build quality is top notch. One could have side boxes for protecting the petrol tank in a skid along the tarmac, protecting our poor tootsies when tree stumps are trying to take them out and even store more heavy stuff in.

    http://www.advrider.com/forums/showpost.php?p=13360687&postcount=366

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    #33
  14. b737jets

    b737jets Baja Explorer

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    That's a cool idea on that plate with storage up front I like it....
    #34
  15. GooF2

    GooF2 Adventurer

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    #35
  16. GooF2

    GooF2 Adventurer

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    bump
    #36