List of motorized bicycle gearboxes

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

  1. Egor

    Egor New Member

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    I took the carb off and had a look at the fuel holes in the side and they are there, but I suspect they are too small, it would be hard to increase the size. They are drilled out under a welch plug. I drilled out the main jet and it is still too small, I have to leave the choke on to make it run WOT. Have fun, Dave
     
  2. linnix13

    linnix13 Member

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    yep! same here, need to have half choke to run it, but i dont mind, it still goes good
     
  3. karma1968

    karma1968 New Member

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    heh i must be one of the lucky ones. my carb works great even in this cold weather.
    left it out side all day to see how it starts when cold. flip the choke on 2 pulls later it starts. turn the choke off and its ready to go. but if anyone can find a good carb to replace this one im all for it.

    has anyone opened the crankcase? i really would like to get a look at the parts used. piston etc.
     
    #23 karma1968, Dec 28, 2009
    Last edited: Dec 28, 2009
  4. tyrslider

    tyrslider New Member

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    Any intentions of updating this list?
     
  5. MaxPower

    MaxPower New Member

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    I put a link to your build thread. go ahead and put post something about your drive and I'll add it to the first page.
     
  6. tyrslider

    tyrslider New Member

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    Thanks Max!

    Just wanted to add the limited edition WhisperDrive to the list. Cake to install and icing to operate, this 1 speed automatic is brimming w/ style and sophistication; A window into the works lets onlookers gaze w/ wonder! The WhirlyGazer Technology also helps you, the rider, check o/a condition at a glance. 3 HD High Speed Sealed Bearings on the Primary Shaft Inspire Total Confidence. The throaty 4 stroke sound through the FBC signature SS pipe is nothing less than assertive. Be the 1st on your block to Command Respect!

    Currently in Production the "WD" is a simple and economical 4 stroke kit made (not sourced) almost entirely StateSide. All componants are made right here in the USA except as listed here: the bearings and final drive chain are made in Japan and the sprocket, throttle and grips are made in China. Depending on the motor you use it is likely made in China.

    The "WD" comes w/ Drive System, Engine Mount, Wide Cranks, FBC SS Exhaust, Chain and Rear Sprocket.

    $440

    W/ HD Rear Axle Grubee MB Wheel (W/ FreeWheeling Rear Sprocket)

    $540

    FBC AirFilter and Chain Tensioner available at $20 each w/ order of "Base Kit"

    You Buy Only What You Need!

    Will work w/ many engines including Lifan, B&S, Honda GX100 and most notably the Harbor Freight 2.5 HP ($109.99 but often on sale for $89.99).

    Cheers, Evan

    Pls follow these links to see what I'm talking about!

    http://motorbicycling.com/f37/new-frame-4-stroke-kit-development-13442.html

    YouTube - ShellyBelly WhisperDrive

    YouTube - An evening in front of the FireBelly!

    YouTube - FireBelly WhisperDrive in true technicolor extra reality TV

    Thanks Again!
     

    Attached Files:

    #26 tyrslider, Apr 15, 2010
    Last edited: Apr 15, 2010
  7. gareth5000

    gareth5000 New Member

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    Have a look at my gearbox. I designed it myself. It could be lighter but it's tough.
     

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    #27 gareth5000, Aug 17, 2010
    Last edited: Aug 17, 2010
  8. WayneC

    WayneC New Member

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    Looks SUPER from my house!
     
  9. tyrslider

    tyrslider New Member

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    Dig it! Looks like you've adapted some sort of right angle reduction box. Looks tough! Whered you find one w/ the reduction and rpm range! Or did you really make the whole thing?

    Cool!
     
  10. gareth5000

    gareth5000 New Member

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    Yeah, I adapted a reduction box I found. It has worked out well.
    It freewheels and rides like normal pushbike. The motor is powering the front sprocket so there is only one heavy duty chain running to the 7 speed Shimano. It can climb anything in first gear and cruises at 35-40 kph in seventh, more if you pedal.
    I've had a few brainwaves since I built this, I'm looking forward to building mark3.
     

    Attached Files:

    #30 gareth5000, Aug 22, 2010
    Last edited: Sep 17, 2010
  11. 5-7HEAVEN

    5-7HEAVEN Well-Known Member

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    I do.

    My 5hp+ GP460 high-rpm engine is connected to the 5:1 pocketbike $25 gearbox that no one here mentioned. The box then bolts onto the Scooterguy frame-mounted engine plate.

    JMO, this 5:1 is the most versatile, compact tranny available. Linked to the Scooterguy frame-mount, any engine with a 76mm clutch will bolt on. There are quite a few engine sprockets that are available. You can use SBP or pocketbike chainrings and freewheel mechanisms, which then transmit power back to the rear derailleur.

    This is the cheapest gearbox available. Combined with a NuVinci hub or multi-speed cassette, there is no other combination that will better maximize any engine's performance.
     
    #31 5-7HEAVEN, Nov 24, 2010
    Last edited: Nov 24, 2010
  12. 5-7HEAVEN

    5-7HEAVEN Well-Known Member

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  13. AuNaturalTanner

    AuNaturalTanner New Member

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    Is it possible to join a SBP "Jackshaft" with a Grubee G4?
     
  14. Ghost0

    Ghost0 New Member

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    It will work with the 4G for the Honda but not the Huasheng. But let me try and be clear there are two versions of the Huasheng. One has a crank shaft that extends beyond the case and the other has a small tapered shaft that the clutch assembly bolts directly to. The ones with the output shaft is like the Honda is the correct one as the 4G for this engine type is narrow enough to work with our kit. The 4G made for the Huasheng with the tapered shaft is too wide to work with our kit.
     
  15. The_Aleman

    The_Aleman Active Member

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    Yup, the "5/8 shaft" Huasheng (HS 142F) takes the "Honda 4G" and does work fine on the SBP shift kit. You may have to modify the 4G cover for the pedals to clear it.

    I just passed the 1300 mile mark on my setup, here's an older pic:

    [​IMG]
     
  16. AuNaturalTanner

    AuNaturalTanner New Member

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    Thanks for the help. Where did'ya get your tank?

    A.N.T.
     
  17. The_Aleman

    The_Aleman Active Member

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    Tank is from Coyote-Gear Wholesale Aluminum Tanks

    Mine is a 6" x 12" endfiller. They are expensive and the cap that comes with it is not very good, IMHO. The original cap lasted a month before it broke. Rather than replace it with the same one, I bought one from Autozone. I also had to design and laser-cut a plate that would secure the tank to the frame.

     
  18. industrialphreak

    industrialphreak New Member

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    Actually $99 for this style tank is not bad at all, pirate cycles has a similar tank they want over $150 for. its brass or copper though and i dont know if it comes with mounting hardware.
     
  19. charliechaindrive.

    charliechaindrive. New Member

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    What do these hoot gearboxes look like?
     
  20. MaxPower

    MaxPower New Member

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