An "Honest to God" manual gearbox

Discussion in 'Transmission / Drivetrain' started by Dankoozy, Mar 17, 2013.

  1. Dankoozy

    Dankoozy Member

    Does anyone make these or has any place made them in the past? Not derailleur but a fully sealed manual gearbox that mounts onto the engine with manual clutch / shift lever as would be on a real motorbike?

  2. MotorBicycleRacing

    MotorBicycleRacing Well-Known Member

    Mounts on to which motor?

    Motorized bicycle laws in most states says no shifting or only auto shifting like
    on a 2 speed moped.

    Nobody has made a gearbox like what you are asking about.

    Anyone who wants that uses a motorcycle engine.

    Check out Motoped.
    I rode that one and it's really hard to change gears with the pedals
    even for a life time motorcycle rider.

  3. BigBlue

    BigBlue Active Member

    Here's a rare combination - Arab-Villers. They only made them for a year, 1924 - 1925.

    SDC16693.jpeg Arab-1924-picture.jpeg SDC16695.jpeg

    Good Luck,

    AKA: BigBlue
    Dankoozy likes this.
  4. V 35

    V 35 Member

    That is cool ! I hope someone builds a replica ! I wonder where they got the name ARAB I know Villers was a bicycle / motorcycle manufacturer, but know nothing about these early bikes. Could ARAB refer to nomadic ?
  5. Dankoozy

    Dankoozy Member

    Was thinking something like a GXH50 but knew I'd be pushing my luck out into the unknown. Still there are plenty of single speed reduction boxes and shift kits so I thought someone with a CNC milling machine might have tried to make one. Who ever made a prundlebox a legal requirement should be shot :p

    The Arab looks like a nice piece of machine, GEBE kit from the year dot. :)
  6. Fabian

    Fabian Well-Known Member

    That Motoped looks like the bees knees, but it's getting away from the ethos of a true bicycle with engine power being driven through the original gear and derailleur system, which is what makes it so special as you have more than 6 gears to play with, or in my case, i have a combined 27 gears to play with: 3 at the front and 9 at the back.
  7. IbedaYank

    IbedaYank Member

    villers made motors... many companies used them for many things besides motorcycles
  8. LR Jerry

    LR Jerry Well-Known Member

    Some old Sach had a 3 speed shifter on them but are very hard to find now. I've got the only motorized bicycle in the world which shifts 5 gears automatically through a shift kit. I use a Land Rider derailleur with a custom built 5 speed freewheel I made. The system works perfectly. Upshifts and downshifts automatically.
  9. Dankoozy

    Dankoozy Member

    I had an old sachs with only 1 gear. If you dig around the site there are a few more builds around with chain driven automatic derailleurs I think. From reading some dutch forum the 3 speed sachs seems to be an older model. I wonder what year
  10. LR Jerry

    LR Jerry Well-Known Member

    All the research I've done I have found no autoshift derailleur being used in combination with a shift kit. I've been trying to find others but haven't so in two years of searching. I have found a couple of bikes being used with Golden Eagle set ups but all that means is the engine only drives a single ratio and the peddles drive multiple ratios. One guy using an electric motor tried to what I've done but didn't how to adapt the derailleur drive pully to work on his set up.

    However if you know of somebody who has a set up like mine let me know.
  11. sparky

    sparky Active Member

    I just heard of electric auto-shifting derailers last year (maybe two), but I figured somebody had already tried that. Guess not.

    Great idea, tho. I'd like to see some videos of you actually working it on the roads. :tt1:

    Would you change any of the gearing if possible?
  12. LR Jerry

    LR Jerry Well-Known Member

    Been riding the bike for over two years now. I've recently talked with the dealer who is putting electric hubs on the front wheels of Land Rider bicycles. However mine is a gas engine which runs through a shift kit. The freewheel I built is (34, 28, 24, 20, 16). I'm 6'2" and weigh 250 lbs. The level ground speed is 29 mph and I can go up any hill here in Tennessee at least 8 mph.
    In the future I plan to install an 350 watt electric motor on the front wheel. I'm going use dual twist throttles. The electric one will have a hook attachment to slightly pull in the break lever when the electric motor isn't being used. This will activate the regen system thereby recharging the battery when only the gas is being used.


    Will be making more videos soon. Shot these two by myself. I could have loosened the cadence adjustment screw and the chain will react like the demonstration videos for Land Rider bikes. I've got the CA screw one full turn shy of full tightness. The bike works great under full load. I've got it working right and didn't want to mess with my adjustments for the free spin videos.
    Last edited: Mar 23, 2013