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Thread: Mini-bike clutch on a harley, automatic??

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  1. #1
    Join Date
    Dec 2005
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    4,459

    Default Mini-bike clutch on a harley, automatic??

    http://www.youtube.com/watch?v=Izc2oTImyjc&eurl

    Whatcha think? My first impression is.. neato, but I'd probably kill myself with a new skill to learn. I blip the throttle at redlights cause the old pan would not ever idle exactly right. A very old habit for 18 years.
    If she ever went KEER_CHEW.. it backfired out the carb and dried up the intake.. then you were in for a round of kick boxing with the kicker. A thing of running high timing, stiffer valve springs, and a long throat Super B carburetor.
    (now I got a button starter and fuel injection that idles perfect, but old habits persist.)

    http://www.youtube.com/watch?v=6CAQkIh51iE
    See there hydraulic front ends do work on stretched out motorsprinklers, they are a hydraulic bumper.. ha ha... (useless on a bike stretched out, handle like crap, more fork flex than slide)

    Installation instructions:
    http://www.grandeurcycle.com/site.htm
    Last edited by Dawai; 05-20-2008 at 07:24 AM.
    Excuse me, I farted.

  2. #2
    Join Date
    Mar 2005
    Location
    Toronto
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    6,573

    Default

    Quote Originally Posted by David E Cofer
    [http://www.youtube.com/watch?v=6CAQkIh51iE
    See there hydraulic front ends do work on stretched out motorsprinklers, they are a hydraulic bumper.. ha ha... (useless on a bike stretched out, handle like crap, more fork flex than slide)
    hehe ...i remember when i was a kid i thought a burn out was a cool thing....but man that guy has got to over 12 isn't he?

  3. #3
    Join Date
    Jan 2004
    Location
    Spokane, Wa
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    Default

    I wonder how it shifts if you have wait for the engine to slow down before it dissengages.

    They should make it just like a little Honda. You can shift them up or down at will because when you move the shift lever, it also releases the clutch.

    There is a burnout video on that page that shows a guy with a clutch like that going through 3 gears. But he has to back off the throttle, and wait for the clutch to slow down before he can go to the next gear. If the shift lever were connected to an overriding mechanism that released the clutch he could bang through the gears without a pause. That, or connect the mechanism to the clutch lever.

    Good idea, and I can see a use for it, on a parade bike.

    I've kind of done that on this little bike project. I removed the foot shift parts that release the clutch, and using a cover from a manual clutch engine, I rigged up a foot release. I push the foot pedal down, put it in gear, and I can take my foot off the clutch pedal. Just give it gas to go. To shift it, I just push the pedal down move the hand lever and release the pedal.

    It isn't shown in this picture, it's part of the floor board assembly, but when done it will look like it is a foot clutch bike, but without the hazards.

    Gene

  4. #4
    Join Date
    Jun 2007
    Location
    Costa Mesa, Ca.
    Posts
    246

    Default

    The clutch that he is showing on the big twin is basically the same as a dirt bike clutch was was developed about 8 or so years ago. Nothing new just a cintrifugal clutch same as has been used in drag racing for years.
    "the ocean is the ultimate solution"

  5. #5
    Join Date
    Sep 2006
    Location
    grand rapids Mi
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    1,233

    Default

    Interesting design, I'm impressed that it does look like the regular clutch is functional too.

    Don't exactly like the 2000+ rpm engagement speed though, unless it has an extremely gradual hook-up, on some of my bikes that would dump you. May be one of those things that don't like a short wheelbase.

    Ken.

  6. #6
    Join Date
    Dec 2005
    Posts
    4,459

    Default Sold One..

    I think I've sold one.. Dlr cost is $174..

    We'll get to see how it works.. I wonder, do you build the roller pack? how in the world sideways would you stack all them bearings in? Lay motorcycle on it's side?

    Grease has always worked before with transmission bearings.. No No around clutch plates thou.

    Really, as far as ease.. the old mousetrap on the 58, it had a eccentric spring that helped pull in the clutch once it broke over.. problem was it had about six places to adjust and you saw people pushing them out with their foot.. Hard to adjust, I always started on one end and worked to the other.
    Most non-mechanically inclined people swapped it for a superglide cable and bracket. THEM squeaked each time you'd pull them in.. too much force. Of course I have always ran barnett heavy springs and clutches.


    How will the auto clutch work "dirty".. will it hang?
    Addeum: I just ordered one of these for a bike here in the lil harley shop.. It has a bdl belt drive in it. We'll see how it works.
    Last edited by Dawai; 05-20-2008 at 06:37 PM.
    Excuse me, I farted.

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