Puch Magnum Electric Conversion

General Discussion about large electric scooters and motorcycles and other things with no pedals.
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cdubriske   1 µW

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Puch Magnum Electric Conversion

Post by cdubriske » May 01 2020 10:53am

Hello everyone - i am starting a overhaul of my Puch Magnum to electric and wanted to post here for feedback and suggestions.

Basics of what i'm looking for. 35-45mph so i can keep up with in-town traffic. I live on the top of a pretty good size hill so it needs to be able to climb, that was my main problem i had with the original gas setup, a lot of pedaling to make it back home. Range isn't all that critical, i'll just being driving to work, maybe a mile from home, and around town.

I do business in China so i'll be sourcing most of my components from there. I understand the pitfalls when buying Chinese and have become pretty adept at spotting fakes and lesser quality so i'm not too worried about that.

This is where i'm leaning for specs
72v - 3000W brushless motor mid-drive mounted, from what i understand the hub mounts don't handle hills very well. I know there is an ebike simulator out there but i don't have specific specs on my motor or gear ratio so i'm just looking for feedback from real world experiences.

I will be making a 72v roughly 15ah battery with the kit from these folks ( https://vruzend.com/product/vruzend-battery-kit-v2-0/ ). Mainly so i have a little more freedom to shape the battery that works best for mounting.

One thing i haven't decided on is chain versus belt drive, i'm open to either so if any one has feedback that would be appreciated.

I'll be removing the pedals so no need for pedal assist or anything like that.

I haven't seen any big differences in the generic throttles, screens, controller setups so i think i'll just get whatever comes with the motor from the manufacturer. And i can upgrade those later on after testing them out. I would take some suggestions on controllers though, or atleast specs to look for when purchasing a controller for this size motor.

Attached are some pictures of before and after tear down, that's as far as i've gotten. Waiting on new rear shocks and a new fork to be delivered.

Thanks for any feedback or suggestions.
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skeetab5780   10 MW

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Re: Puch Magnum Electric Conversion

Post by skeetab5780 » May 01 2020 11:06am

SICK top tank! Sub'd

that is a expensive moped around here probably $1500

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fechter   100 GW

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Re: Puch Magnum Electric Conversion

Post by fechter » May 01 2020 1:05pm

Looks like a great project.

Chains are much easier to work with but need maintenance and are noisier. I’d go with a chain to start with. You could switch to a belt later if the noise is too annoying.
"One test is worth a thousand opinions"

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amberwolf   100 GW

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Re: Puch Magnum Electric Conversion

Post by amberwolf » May 01 2020 11:00pm

Have you seen this?
viewtopic.php?f=10&t=56603

cdubriske   1 µW

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Re: Puch Magnum Electric Conversion

Post by cdubriske » May 04 2020 7:35am

amberwolf wrote:
May 01 2020 11:00pm
Have you seen this?
viewtopic.php?f=10&t=56603
I have read that one a couple times. I was hoping for something a little more recent than 2015, also a big bummer that he never finished the project.

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MJSfoto1956   10 kW

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Re: Puch Magnum Electric Conversion

Post by MJSfoto1956 » May 04 2020 4:44pm

cdubriske wrote:
May 01 2020 10:53am
...from what i understand the hub mounts don't handle hills very well...
My QSmotor V4 hub takes my 230lb scooter to 60mph on slight inclines. Much more downhill. 45mph going up very steep hills. Given the lack of space, I would strongly suggest a hub motor over a mid-drive. You will need every square inch for the battery.

M
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cdubriske   1 µW

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Re: Puch Magnum Electric Conversion

Post by cdubriske » May 05 2020 7:32pm

MJSfoto1956 wrote:
May 04 2020 4:44pm
cdubriske wrote:
May 01 2020 10:53am
...from what i understand the hub mounts don't handle hills very well...
My QSmotor V4 hub takes my 230lb scooter to 60mph on slight inclines. Much more downhill. 45mph going up very steep hills. Given the lack of space, I would strongly suggest a hub motor over a mid-drive. You will need every square inch for the battery.

M
That is good to know, thanks. I ordered the motor already to mount somewhere mid-drive. The problem i was facing was finding a hub motor with a wheel that would fit, these are 2 1/4 x 17 wheels and they barely fit inside the rear swing arm and without rebuilding that i couldn't fit a wider or bigger tire. Is your QS motor the 8000W version? That's a lot of power, probably requiring a lot of battery.

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