Bolt-on LL Forks

Discussion in 'Hacks' started by bhp-equals-fun, Sep 6, 2013.

  1. bhp-equals-fun

    bhp-equals-fun Adventurer

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    So I was sat dreaming about the world of Diesel propelled hacks and I found this stunning bit of MZ porn, you may have seen this before but take a closer look at the LL forks - there utter genius!

    http://upload.wikimedia.org/wikipedia/de/b/bf/MZ-Diesel.jpg

    I fancy having a bash at making some in the next few months if I get some free time, for attachment I'm thinking a big old clamp that clamps to the top of the fork stancions so theres no modification to the original telescopic forks.

    Anyone tried anything like this?
    #1
  2. bbjay

    bbjay Been here awhile

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    #2
  3. TouringDave

    TouringDave Tri Moto Veritas

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    So, what's the difference between what's on the MZ and what's on my V Strom?


    Both serve the same purpose and utilise the existing telescopic forks.

    [​IMG]
    #3
  4. NitroMax

    NitroMax Been here awhile

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    It's called a "Schwabel" ( "Schw"inge/G"abel" )

    "Schwinge" is german slang for swingarm

    "Gabel" is German for forks
    #4
  5. bhp-equals-fun

    bhp-equals-fun Adventurer

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    I'm certainly by no means an expert and i've not yet experimented with LL yet so the only opinion i can make is based on day dreaming so i do stand to be corrected but....
    *in my opinion* Yours increases the wheel base and decreases the trail but your still running predominantly on telescopics, telescopics are independant so *could* compress more on one side than the other causing its own weird gyrations that affect steerability...

    I'm thinking the mod on the mz will use the telescopics purely as suspension and the framework for steering giving more of a fixed up down, left right, movement and of course the desired reduced trail. What i have learned from the last year of daily sidehacking is it just doesnt seem right to be steering with my suspension... Mostly because im on my 2nd set of seals in 12 months and my stancions are in very healthy condition.

    As i said im no expert and it certainly would be a lot easier to make your mod than the mz mod.

    Opinions / experiences would be very helpful.
    #5
  6. Sidecarjohn

    Sidecarjohn Been here awhile

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    Have no personal experience of identified options. However, the "Schwabel" approach certainly has some possible attractions, particularly the perceived mechanical integrity. Having seen a "Schwabel" set up on a very tidy airhead BMW outfit (still looking for the pic), the owner confirmed its benefits and reliability.

    Can appreciate your misgivings about the alternative of simply devising plates to relocate the front axle. There are merits in terms of achieving better handling and control, i.e. head shake elimination, etc., but mechanical integrity could, in my opinion, be influenced by the mounting possibilities on the bike's fork sliders. No disrespect to the sturdy MZ, but the sliders were not primarily engineered as on larger motorcycles such as the illustrated Suzuki.

    On the other hand, amendment at the yokes as Nitro Max has identified also looks attractive.
    #6
  7. bhp-equals-fun

    bhp-equals-fun Adventurer

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    Yeah the stock forks are brilliant for solo riding but there not great with the sidecar, there have been times when heavily loaded on sharp bends where its felt like i could almost twist the telescopics with the steering forces needed, this is a real rareity and only when fully loaded with wood, but not a nice sensation. Its not surprising though as ive got a ts125 in my yard with the same size forks
    #7
  8. NortwestRider

    NortwestRider TRIPOD ADVENTURER !!

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    Dave,Those Leading Legs are AWSOME !!!!!!!!
    #8
  9. Dan Alexander

    Dan Alexander Ride Far - Ride Fast

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    I posted a similar pic and wondered about mounting them on my GS and how they would work.

    [​IMG]
    #9
  10. DRONE

    DRONE Dog Chauffeur

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    [​IMG]

    The opposite of "bolt-on". :1drink
    #10
  11. TouringDave

    TouringDave Tri Moto Veritas

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    Ooooh yeah! :clap
    #11
  12. Kyler

    Kyler Confused Hack Nut

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    consider this picture before you totally discount telescopic forks. This is an Ayr motocross sidecar. Ayr makes these commercially.

    [​IMG]
    #12
  13. bhp-equals-fun

    bhp-equals-fun Adventurer

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    Ok you got me on that one! they are a very nice set of forks, i'm pretty sure there waaaaaaay over my piddly little shoestring budget and I'd need to replace the whole front end.

    But yeah, if money wasn't an issue....
    #13
  14. MILLENNIUM FALCON

    MILLENNIUM FALCON Been here awhile

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    All the leading leg mods I have seen are done on bikes with dual front disc brakes......what do you do for bikes that have a single disc? I.e. No mounting bolts for the leg plates on one side. My hack uses usd motocross forks and only has a single front disc. Thanks!
    #14
  15. Kyler

    Kyler Confused Hack Nut

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    you only mount one disk. This bike only has one disk and I raced it up Pike's Peak. It will pull to the side the disk is mounted on but you get used to that.

    [​IMG]

    it is hard to tell from this pic, but this bike only has one front disk as well. This bike brakes exceptionally well and does not pull. I believe that is due to inter-connected brakes.

    [​IMG]
    #15
  16. FR700

    FR700 Banned

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    That's all well and cool but he asked about leading legs not leading links.

    Neat old XS 650 , yours ?


    .
    #16
  17. Kyler

    Kyler Confused Hack Nut

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    his real question appeared to be mounting one disk and the concept is the same leading or trailing.

    that bike belongs to Dave Hennessy - I rented it from him and have been trying to buy it ever since.
    #17
  18. MILLENNIUM FALCON

    MILLENNIUM FALCON Been here awhile

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    yeah sorry if i was confusing in the way i phrased the question but I was asking about bolting Leading leg plates onto my existing fork legs. My concern was since I only have a single disc that there are really on two strong mounting points besides the axle holes. these holes are the caliper mounting bolts....so they are only on the side with the disc. The vstrom in the previous pictures utilized the caliper mounts on both sides and would be much stronger. I was just wondering if anyone has a solution to this. Thanks!
    #18
  19. Dan Alexander

    Dan Alexander Ride Far - Ride Fast

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    That's very nicely done, so simple and clean.
    #19
  20. claude

    claude Sidecar Jockey

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    Some type of pinch block around the fork tube would probably work okay. I don't care for relying on the caliper mounts alone whether on one or both sides. There is leverage on them in a pulling fashion that could be a concern.
    A positive stop to counteract this may be a simple solution. Overbuilt? SO WHAT.
    #20