Will a typical 80cc Chinese motorized bike kit work on a fixed gear bike?

[AidanC]

If I were to mount a motor from one of those cheap chinese motor kits onto a fixed gear bike, would the engine drive the pedals?/is there an easy way around this?

 

[Deleted member 12676]

the fixed gear bikes I had always had a coaster hub so that the wheel didn't force the pedals. They were the kind of hub that allowed you to move the pedals backwards to actuate the brake inside the hub.

 

[bluegoatwoods]

This isn't my area of expertise. But if we're talking about a true fixed gear bike, then yes; the engine will propel the pedals.

I don't think that type of bike can or should be motorized.

Sorry about that. But the good news is that you can get a bike that is right for the job cheaply enough.

 

[Deleted member 12676]

the only single speed bikes I've ever seen without a coaster rear hub were those little $50 bikes for 4 year olds.
So unless you have one of those then NO it won't move the pedals.

 

[retromike3]

I think it can be done but, its killing the idea of a fixed to start with. The neat idea of a fixed it that is very simple. if you add a motor and extra drive train that weighs more than the bike you start with, then you are violating the KISS design concept (Keep It Simple Stupid)

Mike Frye AKA Frye Bikes

 

[Sidewinder Jerry]

There are lots of true fixed gear bikes out there which aren't a child's bike. It would be way to dangerous to motorize one of them. You don't even want to go down a really steep hill on a fixed gear bike.

 

[BigBlue]

If your bike is a fixie, it doesn't have a freewheel hub and will cause your pedals to rotate. You can use a flip-flop hub and put a freewheel on the rear hub, so the pedals don't rotate.

Chris
AKA: BigBlue

 

[HeadSmess]

theres no reason why you cant, a bike is a bike. you just have to live with the legs constantly going up and down. if its what you have and ride, are used to the way fixies ride, go for it. corners and all that sort of stuff. fun

ive got a few coaster hubs here. one or two that DONT have back brakes simply so us BMX freaks can ride em backwards without the pedals playing silly buggers. fairly easy to modify so they do this, without buying the real ones. our "bowl" or "swimming pool" was actually a dam. hard to keep the vert ,erm...vert!

i also have a bendix kickdown coater hub. two speed hub gear with coaster brake. awesome little back pedal changes gears, big one hits the brakes this should be chromeplated and mounted to a plaque...

but, back to the fixie. personal taste. its not a huge drama to get a new wheel, either

 

[KCvale]

A fixie is typically a 24" or smaller BMX style trick bike, you can pedal forwards and backwards (no brake), cool for riding your bike under like 5MPH like a unicycle.

Chances are you wouldn't fit a motor kit in the thing anyway so a moot point as you don't see many 26" fixies.
In the rare event you have a 26" fixie bike a motor would fit in then just have your local bike shop swap out the fixie hub for a $50 HD hub with the motor drive sprocket and a band brake mounted on it.
http://www.gasbike.net/bike-motor-engine-heavy-duty-axle-kit-non-free-wheel.html

Don't confuse the 'non-free-wheel' descrition meaning the pedal sprocket is like your fixie, it freewheels but doesn't have a coaster brake, it has that band brake.
The description is because they offer a freewheel on the motor drive sprocket for pull start motors that don't need to be bump started as well.

For most just the perfectly mounted sprocket and band brake are worth the money and what is going on a repair customers Huffy with a trashed rear hub.

 

[Jeckler]

Quite a few companies are making fixies in 700c, so it's in no way limited to 24" and below. A quick search reveals a lot of them come with flip-flip hubs too.