F800GS - RXV Shiver'ed Fork Conversion

Discussion in 'Parallel Universe' started by Gangplank, Jul 25, 2010.

  1. Gangplank

    Gangplank Advenchaintourer

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    I have found the best way to do it is to take everything apart and bring the following to the machine shop:
    1) bring both BMW bottom feet/lug obviously
    2) one of the donor fork bottom adjusters
    3) one of the donor fork bottom feet/lug

    That way they can see how it all goes together and can measure the donor lug set up to match the machining to be done.

    Turn around time on the 2 sets I've had done is about 1-2 weeks.
  2. surferdude

    surferdude Adventurer

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    I just ordered a set of new take-off Shivers from a 2004 Husky and the guy says he has more sets. They were $250+35 shipping and brand new. If you search eBay "Marzochhi 45mm" you will find the seller or PM me. They should arrive later this week - if anyone has had their 800GS forks machined in the Seattle area send me a PM with details. I may just have Alex at Konflict do the entire job but looking to save a few $.
  3. epicxcrider

    epicxcrider Been here awhile

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    After riding a few days I've determined the front ride height is a little high, but everything else seems perfect. Going to drop the legs in the trees 1/2" and go from there.
  4. Gangplank

    Gangplank Advenchaintourer

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    There are marks on the tops of the fork tubes. I always had mine up through the triples.

    Did you shorten yours 1" or stock length?
  5. epicxcrider

    epicxcrider Been here awhile

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    Oops, I meant raise
  6. Gangplank

    Gangplank Advenchaintourer

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    I knew what you meant. It's always a connundrum. Raise the forks vs. drop the triples. :rofl

    Dropping the front end by 5-10mm will make the bike turn in more quickly and handle better for some folks. It will make the front end a bit more twitchy under acceleration. Different bikes get different solutions.

    On my GSXR-750 race bike the preferred set up is actually to raise the front 5-7mm (bringing them to flush with the triples or even 5mm down into the triples) and also raising the rear by putting a 5-7mm shim at the shock clevis (stack of washers). It raises the bike and makes it handle and turn in better. Weird right? But that is what the trackday & race pace needs on that bike.

    On the F800GS from day one I popped the forks up 5mm. It always handled better and it made the rear shock work better.

    Why? I think it put a bit more weight on the front during decel. Which would also add to the front end woes with the stock forks. Once I got the front end done with the Shiver forks the front end was 10x better and the rear shock worked "ok" for me at 185lbs. With luggage & gear it was still terrible but solo it worked ok but not great.

    Still time for Elka shocks :deal
  7. epicxcrider

    epicxcrider Been here awhile

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    Ya, that's the issue I'm having. I think now that it's sprung correctly the ride height is a little higher than stock and I can feel the lazy turn-in. It puts too much load on the rear end.

    Yes, the new shock should solve this issue :)
  8. Gangplank

    Gangplank Advenchaintourer

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    Drop it about 5 mm at a time and test ride. There are markings on the fork tube. You'll be surprised how much a difference 5mm can make.

    Through a few years of riding track days, reading online, and learning I put together some tips on tuning in suspension. Give it a read but YMMV. This was put together for my track bike but the general principals still apply. Works for me, may not for you. Note: the first part on reading tires is for street bikes. The second part on handling method applies more to DS bikes and tires Suspension Tuning Tips
  9. dirtysouthjacket

    dirtysouthjacket Been here awhile

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    I looked very hard at these and almost got them before buying the used set I found. Good luck with your swap!
  10. dirtysouthjacket

    dirtysouthjacket Been here awhile

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    Those links are going to prove invaluable to me once I start playing with the setup! Thanks!
  11. dirtysouthjacket

    dirtysouthjacket Been here awhile

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    I'm headed to a machine shop that I have used a lot to talk about the project. But I see you royally screwed this up epicx. You machined in inches and not millimeters!!!!! :lol3
  12. epicxcrider

    epicxcrider Been here awhile

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    Haha try and find a metric shop in the us ;)
  13. Gangplank

    Gangplank Advenchaintourer

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    Glad my tuning tips cheat sheet is helpful. Once you get them set up you'll find you only make slight adjustments for road vs off road. For me it was 2 clicks less compression for off road... but then again I'm not the most agressive off roader around these parts. YMMV.
  14. machinebuilder

    machinebuilder Long timer

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    I can name several my company deals with all the time.

    when almost anything automotive is metric it's not difficult.

    besides metrics easier.
  15. DoWorkSon

    DoWorkSon Been here awhile

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    Can anyone tell me how to remove the damper rod from the internal tube on the Shiver forks?

    I am not sure of it's name, but its a metal tube that the damper rod goes into. Looks like the piece that stops it from sliding out unscrews off of the tube, but I dont wanna try it unless I am sure
  16. epicxcrider

    epicxcrider Been here awhile

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    I agree, but I have a hard time finding places that will take a metric drawing. They all want inch tolerances.
  17. epicxcrider

    epicxcrider Been here awhile

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    Check out this manual, I'll need a photo to say for sure what step you're at.

    http://www.americanbeta.com/sites/d...r/Marzocchi 45-50mm open cartridge shiver.pdf
  18. machinebuilder

    machinebuilder Long timer

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    You could do what I did to our Fabricator.....He wanted inch and fractions

    I gave him metric with decimals, Inch with decimals, and inch with fractions. It's easy with cad.

    If I had been a real ass about it I would have dimensioned to a 1/32".
  19. DoWorkSon

    DoWorkSon Been here awhile

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    So forks arrived, apart, and ready for machine shop....

    Only problem, is finding a damn shop to do it!!! I went to 4 local shops, and called another 4 and NOT a single one would or could machine the forks...

    So, I called up Dale at J-B Machine(thanks to Gangplank) and he was very helpful and knew exactly what I was talking about. So, they are being shipped out today and should hopefully be done next week. Shipping was only about $20... Had I just done this in the first place, I would have saved $20 in gas driving all around town.

    So, if you are planning on doing this, J-B Machine has the proper tool and know-how to get it done. Should only cost $100
  20. epicxcrider

    epicxcrider Been here awhile

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    Sweet!