List of motorized bicycle gearboxes

Discussion in 'Hubs, Gearboxes, Sprockets and Chains' started by MaxPower, Nov 26, 2009.

  1. charliechaindrive.

    charliechaindrive. New Member

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    Oh, huh thanks. Do they make a internal gearbox for 2 smokers???
     
  2. userix

    userix New Member

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    Are these hoot gearboxes notorious for breaking down fast?
     
  3. MaxPower

    MaxPower New Member

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    If you can find a an engine with the same bolt hole pattern and clutch diameter as the gearbox then yes.
     
  4. MaxPower

    MaxPower New Member

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    That's what I've heard too but I can't say so first hand.
     
  5. charliechaindrive.

    charliechaindrive. New Member

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    Ic, but couldent you run the chain from the motor to the shaft of the box via chain? To look like a board tracker?
     
  6. rustycase

    rustycase Gutter Rider

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    I like Gareth's ra drive!
    What gear set did you use as a base for your project?
    ...something that might be available here???
    Best
    rc
     
  7. N057828

    N057828 New Member

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  8. sylarbrodie

    sylarbrodie New Member

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    just ordered my qmatic. hopefully no more repairs!!!!
     
  9. mezzenger

    mezzenger New Member

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    Hey Guys. It is 2016. Perhaps someone in the know could post updated information? usflg
     
  10. MotorbikeMike

    MotorbikeMike Dealer

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    Hi mezzenger, I am not in tune with everything being made, BUT I do know that EZMotorbike makes the Q-matic, and the Pacesetter drives especially to fit HauSheng and Honda GX50H 5/8 keyed shaft engines, also the internal clutch model of the Hau Sheng (with special adapter we make).

    The Pacesetter is also available drilled to bolt right on to the Harbor Freight 79cc Greyhound, and the 99cc predator models.

    It is adaptable to many other engines, but these are the patterns I am currently aware of. I am currently interested in mounting one to a 3.5 HP Briggs and Stratton Vertical tho I am not sure how I will bolt on to the old engines that I currently have.

    I hope this helps answer your question.

    Mike
     
  11. CycleRyder

    CycleRyder New Member

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    I'm kinda new to the 4 stroke relm of MBs but I had a 4G fail on me twice inside of the first month of use. Now I'm looking at getting a CVT pocket bike transmission. Been eyeing a few that are surprisingly much cheaper than the Grubee 4G or the older Bikeberry 5G single chain & the clutch drum & bolt pattern looks like it would fit my HS 142F. Can anyone let me know what pocket bike CVT transmissions can fit my 4 stroke motor? I'll attempt to post the measurements of one CVT I was looking at getting.
     

    Attached Files:

    #51 CycleRyder, Jun 24, 2017
    Last edited: Jun 24, 2017
  12. MotorBikeFab

    MotorBikeFab New Member

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    Because I am new here I can't post links...

    What do people think about the Piston Bikes "79cc Transmission for Predator 4 Stroke"
    If you do a Google search for "79cc Transmission for Predator 4 Stroke" - a number of links show up and about 4 down is the one for PistonBikes. Comes with a MaxTorque clutch for $100.

    What do people think about the Max-Torque clutches? Can the Max-Torque clutch be "tuned".

    Thanks so much.
     
  13. MotorBicycleRacing

    MotorBicycleRacing Well-Known Member

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    That clutch looks like a MaxTorque clutch but does not have MaxTorque stamped on it.
     
  14. Tony01

    Tony01 Well-Known Member

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    that clutch is not a max torque. and it doesn't say anywhere that it comes with an MT. MTs have internal keyways. this clutch has an internal key. One that I got (clutch only) was actually 16mm, not 5/8". Extra .005" on the diameter can destroy your crankshaft eventually. you never know with junk.

    MTs are great clutches when used on engines at or under their rated power of 8hp. They can be tuned. If you run low gearing of around 12 to 10.5 you can just run the clutch stock, if you go tall like 10 to 8:1 I suggest replacing the stock silver spring with a green spring.

    That plate might still be a good deal though. make sure you get a MT clutch with the right sprocket size for the chain for that plate, probably #35 but check first.
     
  15. MotorBikeFab

    MotorBikeFab New Member

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