R1100GS HP1 Conversion on the cheap!

Discussion in 'GS Boxers' started by gristone, Nov 23, 2008.

  1. gristone

    gristone Adventurer

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    I've always wanted to mess around with one of these and do this conversion. I have seen a few front frames in the forums here and none of them looked very stout so I thought I would just build one myself.

    I am using a 48mm WP front end from an '03 Husaberg. I got an extra left hand fork bottom and slider on ebay and I will have to machine some kind of offset bracket to carry the calipers. The two sides will need to be different (as opposed to mirrored) due to both of the fork bottoms being the same. I looked at it briefly with the wheel and rotors put together and it looks like it should work. I'll be using the nissin 4 pot radials from a gsxr or something-- I can't remember at the moment.

    Here are some pictures of very early progress:
    #1
  2. gristone

    gristone Adventurer

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    Here is the front subframe with the little jig I made for holding the headstock in the correct location while I was fitting up the tubes.

    Attached Files:

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  3. gristone

    gristone Adventurer

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    again

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    #3
  4. gristone

    gristone Adventurer

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    a

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    #4
  5. gristone

    gristone Adventurer

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    Here is a picture with the rear wheel. I had a 5" Excel built up by Buchanan's with a 170/60 17 pilot power on it-- I can't wait to take some rubber off this thing.

    Attached Files:

    #5
  6. gristone

    gristone Adventurer

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    here it is with the completely ridiculous looking 41 litre Touratech tank.

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  7. Possu

    Possu de-nOObed!

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    Excellent work, keep the pics coming. :thumb
    #7
  8. fernan_ci

    fernan_ci Been here awhile

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    where you got this front subframe??
    #8
  9. fernan_ci

    fernan_ci Been here awhile

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    #9
  10. SQD8R

    SQD8R Eat squids and be merry

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    Most conversions have been done for off-road purposes. Is this a road-only conversion? I ask because I prefer the stock set up for road and conversion for off-road.

    Excellent work BTW.
    #10
  11. RichieS

    RichieS Adventurer

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    Some people are FAR too talented....very jealous! Looks like it will be really cool:clap
    #11
  12. AntonLargiader

    AntonLargiader Long timer

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    Did you need to arch the frame to clear something specific? Just wondering what led you to that particular geometry.

    Edit: I'm guessing it's to clear the lower triple clamp at full lock...
    #12
  13. funhouse

    funhouse Overdue

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    If you've got the skills! and I expect a kit could be developed for older GS's.....keep posting......Bruce
    #13
  14. gristone

    gristone Adventurer

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    I may develop this a bit further and offer a kit with just the frame-- you find your own forks and everything else.
    I'll keep posting and we'll see how this one turns out first.. I know it's way overbuilt to begin with, but the first one always is.
    #14
  15. gristone

    gristone Adventurer

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    Thanks!

    This will be an off-road conversion eventually. I just wanted to start it out as a giant supermotard and see how it handles and then put a different front wheel on it. I plan to take it to China in the late spring this year so I will have some on/off-road tires and a slightly larger front wheel (19").
    #15
  16. gristone

    gristone Adventurer

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    I actually adjusted the rake to be a bit more agressive on the steering and the clearances kind of dictated the shape. I tried to get as much of a truss as possible and maintain the parallel lines as much as possible.

    So far everything fits really well. I even kept the stock oil line and breather hose to the airbox in tact.
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  17. gristone

    gristone Adventurer

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    more pictures of miscellaneous details:

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  18. gristone

    gristone Adventurer

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    some swingarm mods to make it look less like a rocketship from the eighties and more like a 90's smoothed-out rocket:

    Attached Files:

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  19. gristone

    gristone Adventurer

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    basically I can't get to the shop until the weekend to do more work on the frame so I'm just posting picks of nonsense.
    Hopefully my heavy fork springs show up from race tech this week and I will put the front forks back together.

    I also need to send all this junk to the powder-coater to shoot in flat black so maybe this weekend I will start to mess around with the rear subframe. I want to reinforce the areas at the footpeg-bracket-transmission-swingarm zone but keep the basic functionality of the rear sub so it still works as a tourer.
    we'll see how that works out.

    Attached Files:

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  20. gristone

    gristone Adventurer

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    here's one of the mostly complete front sub. I still need to add a pin for a scotts dmaper in that small triangular gusset up behind the headstock.. I may just wait and tap it in later when I can afford to buy the damper-- I'm anxious to get this to the powder-coater anyway.

    Does anyone have an R1150gs front beak and headlamp setup that they want to sell? I don't really like the R1100gs front end, and the desierto for the 1150 is so much cheaper without the headlights-- I like the look of the two different sized headlights from the 1150 better than the TT setup anyway.

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