An "Honest to God" manual gearbox

[Dankoozy]

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?

 

[MotorBicycleRacing]

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?

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.

 

[BigBlue]

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



Good Luck,

Chris
AKA: BigBlue

 

[V 35]

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 ?

 

[Dankoozy]

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.

View attachment 47930

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

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

 

[Fabian]

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.

 

[IbedaYank]

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 ?

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

 

[Sidewinder Jerry]

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.

 

[Dankoozy]

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

 

[Sidewinder Jerry]

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.