Electric Razor Scooter to 2-stroke Project

[Markfothebeast]

I picked up a free electric Razor scooter that I figured I could at least use the batteries and electric 24v motor from. Than I decided I could maybe have a little fun and use an old 2-stroke weed whip engine and add three 13" Harbor Freight wheels. I haven't quite decided where I'm going to go from here as far as the drive axle and clutch. Do you think that 2-stroke is powerful enough?

 

[kbs2244]

I would guess you will need to gear it down.
It will not be a speed demon.

 

[theoldwizard1]

3 wheel. Never saw the carnage from the old Honda 3 wheel ATVs.

 

[Markfothebeast]

Yeah. It's still just a scooter so you can bail at anytime, unlike the Honda.

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[jackson1701]

3 wheel. Never saw the carnage from the old Honda 3 wheel ATVs.

Been riding them since 84, what happened?

 

[racingtadpole]

The weed eater motor should be powerful enough if you give it a rolling start to help it. No problem there its a scooter.

I would adapt a roller blade type wheel onto the output shaft of the motor, locked solid to the shaft. Then sit the whole thing on a spring loaded hinged platform above one of the rear wheels. Put another brake lever and cable on the handle bars, and use it to pull the assembly down so the roller blade wheel contacts the tyre to drive it.

Gets you a clutch and drive mechanism and a bit of reduction all in one assembly.

 

[jrj3rd]

Google GoPed and look how they do it.

 

[ilovevocs]

I would widen the deck. The goped has a wider deck and I find it much more enjoyable to ride for a grown man.


You better do some downhill testing before you power it. With the two wheels in the rear you may find the front end configuration less than desirable.

 

[zkling]

You are going to want a more torque motor than that with those wheels.

 

[Farrier]

Hold my beer, watch this....

 

[gungatim]

one of the easier ways guys have been building those over on the motorized bike forum is with a BMX foot peg to drive the wheel directly. you can adapt the output shaft to one of those -- get one that is knurled...you need to do the calcs for the engine RPM range to diameter of drive to driven wheels. you may need a jackshaft setup. chainsaw motors are more popular since they have more power and a clutch; generally easier to adapt.

 

[Todd.Brock]

I would probably use a left over 5 hp Honda motor
This looks like fun. Which I had the time! Keep us updates

 

[Markfothebeast]

Thanks guys (and gals). Lots of good ideas here. I think I'll go the 4-wheel route and raise the ground clearance for rough terrain being that I live in a country area. It will need a wider platform as mentioned. I'll take the old batteries and separate them from 24v in to 12v and run an LED fog lamp on the front.

I picked up a free Trek mountain bike with a bent fork that I can possibly use for parts. Or even use the frame if I can weld it with a stick welder. Not sure if it is Chromoly(?) or aluminum.

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[texasranger]

Thanks guys (and gals). Lots of good ideas here. I think I'll go the 4-wheel route and raise the ground clearance for rough terrain being that I live in a country area. It will need a wider platform as mentioned. I'll take the old batteries and separate them from 24v in to 12v and run an LED fog lamp on the front.

I picked up a free Trek mountain bike with a bent fork that I can possibly use for parts. Or even use the frame if I can weld it with a stick welder. Not sure if it is Chromoly(?) or aluminum.

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I'd think you will be better off going to 2 wheels versus 4. Less weight, less rolling resistance, and you can lean it into a turn rather than pucker. Like others have said, drive the tire directly with the motor on a spring loaded mount. Add a plate so you just push it down with your foot to make the motor contact the rear tire.

 

[gungatim]

Thanks guys (and gals). Lots of good ideas here. I think I'll go the 4-wheel route and raise the ground clearance for rough terrain being that I live in a country area. It will need a wider platform as mentioned. I'll take the old batteries and separate them from 24v in to 12v and run an LED fog lamp on the front.

I picked up a free Trek mountain bike with a bent fork that I can possibly use for parts. Or even use the frame if I can weld it with a stick welder. Not sure if it is Chromoly(?) or aluminum.

Sent from my SM-G920V using Tapatalk

you can always braze it, that is how many bikes are/were put together.

here's a little scooter I built using a kids bike fork and some angle iron, and a 2-stroke toro snowblower engine for inspiration. does almost 30mph...

 

[duwem]

I would look for a gearbox.

http://www.monsterscooterparts.com/trfor3336434.html?gclid=CNTE14KP6NICFQKqaQod-c0FBA

They even make teeny tiny CVT transmissions for these things:

https://www.popscreen.com/prod/OTk1...ocket-Bike-CVT-Transmission-Gearbox-TM03-eBay

 

[ilovevocs]

Here's my go-ped next to a razor 300 to give you an idea of the size difference.

If you want some rough dimensions let me know.