Sherco behind a KTM

Discussion in 'Trials' started by Autostream, Sep 4, 2009.

  1. Autostream

    Autostream Long timer

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    Today my wee project became officially finished, well all except the registration that happens next week.

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    #1
  2. Autostream

    Autostream Long timer

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    Treg style coupling to allow bike to go offroad... or more likely, me to fall over.

    [​IMG]

    Hitch is made from 12mm steel.

    Was going to mount it to where the center stand was mounted, but stand is so strong figured I woudl just attach to that.

    Whole hitch can be off in less than 3 minutes.

    Trailer with bike and gear weighs in at about 200 kg

    Feels a little weird at slow speed, but seems to quiclky settle down over about 10-20kmh... but have yet to give it agood run.


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    #2
  3. nevgriff64

    nevgriff64 Spelt with 2 ffs Super Moderator

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    Sensational stuff Auto.. :clap

    It looked good when I saw it the other day but it looks even better finished.. Well done.. :thumb

    Just as a thought, what have you done to steady the KTM when loading the Sherco?? I`d imagine it would push the 990 off its side stand if you pushed the bike onto the trailer too hard..
    #3
  4. Autostream

    Autostream Long timer

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    Actually I thought that, but stood on the very back of the trailer, I weigh about 30kg more than the Sherco and all it did was lift the back wheel off the ground a little.

    Much more stable than I expected.
    #4
  5. nevgriff64

    nevgriff64 Spelt with 2 ffs Super Moderator

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    Excellent.. :clap

    Look forward to seeing the finished product on Sunday.. :thumb
    #5
  6. Autostream

    Autostream Long timer

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    Not this Sunday as I couldn't get a registration apppointment until Wednesday.

    It is only a small trailer and would be exempt, but being wider than the towing vehicle means it needs to be registered.
    #6
  7. grizzzly

    grizzzly The Pre-Banned Version

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    Nice :thumb I have been thinking about doing the same thing with my 650L
    #7
  8. harcus

    harcus Long timer

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    Autostream

    Is this style coupling common in AU? Production? Home made?

    Nice work!

    JLH
    #8
  9. Autostream

    Autostream Long timer

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  10. PTRadam

    PTRadam Been here awhile

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    Good work man! We have a guy here in PA that hauls his trials bike on a side car on his Harley!
    #10
  11. ct-ktm

    ct-ktm Long timer

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    Sweeeet...:clap :clap
    #11
  12. Autostream

    Autostream Long timer

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    Initial ride report.

    Rides like having a heavy novice pillion on the back, except it does not squash the suspension down.

    U turns - no probs

    Up and down curbs and slow maneuvering - a little wobbly but soon get used to it, speed and looseness is your friend, sort of like riding in sand (to a point)

    General riding - much like the feel of towing a laden trailer behind a car, just need to use care when braking etc.

    Harder braking - could feel the trailer trying to pick one side then the other as the brakes were fed on hard from about 80k / 50 mph, not an issue if you are familiar with riding slippery surfaces off road but may be scary for street only riders.

    Slippery surfaces - I found a factory construction site, excavated clay and it was wet (not my brightest idea for the day) and tried crossing it slowly. Trailer wants to push the front wheel around, but as long as you steer with the pegs and body weight it is not an issue, try steering with the bars and you'd probably be on your butt fast.

    Have yet to try the freeway, that happens this weekend. But if it has a propensity to wobble or weave I will be shifting the axle back about 8". According to the trailer supplier this is common when using this trailer behind bikes and improves the handling.
    #12
  13. Seth S

    Seth S Will _____ for _____

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    Would some sort of electric brakes be a good thing for the trailer: Also I find that the longer the arm on the trailer is the less tendency to wobble from side to side (in a car at least).

    Cool setup.
    #13
  14. NMTrailboss

    NMTrailboss Team Dead End

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    Awesome set up! The best of both worlds! :clap
    #14
  15. RedRider3141

    RedRider3141 277cc's of FUN!

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    EPIC WIN! :clap
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  16. huckleberry

    huckleberry BACK ROAD BOMBER

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    Good thing you have your saftey chicken chocked on there!!!!!:lol3 Cool idea hope all works well would love to do this myself but just seems a bit too big to tow for me i would like to find a way to just lift the front wheel of the trials in a rack and let the rear roll would cut down on a lot of weight!:lol3
    #16
  17. lukachuki

    lukachuki Been here awhile

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    Great thread and nice project....I am one of the weirdos out there that would love to be able to pull a trailer with my MC.
    #17
  18. Autostream

    Autostream Long timer

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    After initial road tests I moved the axle back as far as the leaf spring hangers would allow.

    [​IMG]

    This really changed the feel and handling, while it was OK initially it is really improved now and feels much more secure, particularly at speeds over 80kph / 50 mph up to a max of 120 kph / 75 mph.
    Did some freeway stuff, around big trucks etc, all fine.
    Just got to be more careful to remember it is there as it is quite easy to forget now.
    The only real bumps that are a little weird feeling are the flowing 'whoop' type bumps, the hard hits are absorbed by both the Trails bike and trailer suspension really well.
    But it really is quite easy to tow and gets a lot of funny looks.

    To answer your questions Troy...

    How long to mount/disassemble it?
    I can drop the trailer off the hitch in a couple or minutes, or drop the whole hitch on the ground in less than 5 as there are only 14 x easily accessed M8 Cap screws holding it on.

    And... what are the legalities with getting it rego'd etc. Engineer approvals etc?
    In Victoria as the Trailer is wider than the towing vehicle it has to be registered, paperwork only, no inspection required and cost less than $40, will be less next year for just the renewal.

    ADR covers hitch with all sorts of engineers speak, I figure it is over engineered based on what works and will worry about this if and when and if I need to. If you have no paint to watch dry, you can swat up yourself http://www.infrastructure.gov.au/roads/motor/design/adr_online.aspx

    Insurance fine print does note that a trailer is covered as long as it is made by a specialist trailer company and fit for purpose. The Trailer company I got the Trailer from has supplied and worked with many motorcycle applications so I am using that to suit my interpretation. I'll fight that battle if I need to as well.

    THAT would be just the coolest thing to build for the little blokes new KTM SX 50 adventure to go on the back of... I could ride/tow him behind the SE to training or some of the weekend rides... the guys would just FREAK!
    Easily doable and lots more fun than Mechano or lego

    Could I get a parts list/drawing for the tow hitch... they have small galv. light weight (one) bike trailers on sale here for a song (the ones with the small boat trailer wheels on them)... that off road bike hitch would just be the piece d' resistance! :clap

    The entire project was made on the fly, barely a measurement taken, mostly by eye, which is why it may not look staright to your eye... Nothing more than a few rudimentary sketches to work out a few issues on the way.

    As it stands now, this trailer, complete with trials bike has 70 kg on each wheel and 20kg on the draw bar which I make to be 160 kg or 350 lb. It is not heavy so does not need a heavy hitch or coupling.

    The Trailer itself is just a kitset trailer from China and I believe is sold in the USA in virtually the same form.

    Now, see those LC8 wheels with knobbies in the background on the left? The next stage is to mount them on the front of the trailer either side of the Sherco. Slab it to Murray Sunset nartional Park (500 k's) or other designated area and have two bikes to play with, then slab it back... all without killing a fresh set of knobbies.
    #18
  19. troy safari carpente

    troy safari carpente Team f5ool

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    You sir... are a bloody (mad) genius! :clap :clap :clap

    (I particularly like the spare SE offroad tyre/wheels on the trailer idea bit :evil)... I think I feel an "ultimate off road motorcycle camper/trailer thread" coming along.

    If you did all that by just using eye/rule of thumb engineering... that's a big :clap from me... I guess we can use your photo's as reference points?

    Let's see now, a friday night in the shed, a tape measure, angle grinder, makita drill... a rubber chicken and a six pack! What could go wrong...??!! :lol3

    I do like Seth S' idea of an electric brake set-up though... (quick... someone get me Hayman Reese on the line will ya' ? :wink: ).

    more electrics eh...? Like I said before... what could go wrong?! :rofl
    #19
  20. BarkSlayer

    BarkSlayer Been here awhile

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    I sure hope that works for you...but to me, it's the recipe for doom. :eek1

    Be safe, my friend.
    #20