Electric Motorcycle Build - Jawa CZ 175 GROM

There was a project at my faculty where students can get some funding to make prototype and business plan for their product.
So I made electric motorcycle called GROM.
It started as concept in form of 3D model and calculation where desired values are taken into account such as top speed, acceleration, range so adequate components can be chosen. After research I got all components and started building electric motorcycle prototype.
Base for this electric motorcycle is older motorcycle Jawa. All parts are restored or replaced and chasis was modified to fit electric components. Then electric powertrain and energy source is installed.
The result is vehicle that is easy to use, it cost basicelly nothing to run it, it is reliable and doesn’t need frequent servicing, it saves enviroment and it is really thrill to drive it.
Thanks for watching!
Stay tune for more electric builds.
Feel free to comment and ask any questions.
You can also contact me privately
Instagram:
grom_electric?i...
benjaminkujavec...
Email: [e-mail]

[@davidcoates4852]

Great video, love the bike but we need more information about the specs for the motor, controller and battery. 👍

[@winstonsmith3696]

He said motor is qs138

[@alexdelascasas]

Great Video! excited to see more builds and updates!

[@paul9812-t3i]

That's awesome. Brilliant video. Well done

[@MrHeggie123]

Awesome build , such a cool conversion !

[@ThomasMcFarland]

This is a great conversion, nice work!

[@apeczyslaw]

Dobra robota ja niedługo przerabiam Jawa 50 typ 20 z 1980 roku !

[@montaguebarnabasltd]

Congrats! Sick build

[@engineer3112]

Love it!

[@kengruz669]

Very much appreciate you sharing your Jawa transformation. A thought or two towards some alternate decisions that could be made by anyone doing the same. I immediately groaned when I saw you grinding off the seat bracket. I couldn't be sure, but it seemed you were somewhat tall. But then I thought maybe he's going cafe racer, and plans to move the pegs back along with low handlebars. My thinking was "Why not instead add a second rear seat bracket to raise it, and additionally get some underseat space for mounting the controller , an additional slide-in battery, or anything else? As an example, Juiced Bikes sells a seat riser bracket for their Scorpion moped-style e-bike for just this reason- tall riders. In your last shot, your, knees were splayed outward. Yes, you are a tall guy. Of course, with such a rise, you could go for slight rise handlebars for a more upright ride. Just a thought for different ways one can go. Also, would've been cool to bring that tank back whole with the original emblem and knee guards after cleaning it up. Those tanks are so iconic. Additionally, a hinged door on top would allow storage inside for a glove compartment, the controller, or more battery, But no doubt, your finished bike is sweet and the yellow is bold (not to mention, it adds to street safety.) And of course, you can always go back and raise the seat for more ride comfort later.

[@tanrlarnkatili3825]

respect 👍

[@paulawestcott7228]

GREAT PROJECT! HOWEVER I would have left in silver or raw color the fork lowers, the handlebars, the wheels and the brake drums. This does give you more visibility while on the road.

[@biff1tannen]

Thanks🤩

[@neraroguljic2189]

Bravoo ☺️👏🏻❤️

[@swing-trading-karo]

Great work nice idea can you upload more video like electric motorcycle building

[@simanchalsahu114]

😍😍 keep making this type vdo

[@ElectroZOOMIN]

Awesome.. hope to work with you on building a bike.

[@emreburuk667]

what are your motor specs to yield that 100kmh?

[@fiderias]

How does spray painting last over time ?

[@burf2000]

What motor did you use?

[@ramone79]

Nice build. What gear ratio didt you end up with. How many batteri amps end phase amps. Flux weakening ?

[@benjaminkujavec1194]

Thank you. Current gear ratio is 7.6 and it feel the best for me. Max current is phase/line 530/330A but i limited battery current to 200A until I make bigger battery. It has flux weakening.

[@chadmote3466]

Yes! This is the future. There's a broke down old motorcycle sitting in a field somewhere just waiting to go electric!

[@AntonioGonzalez-iu4mh]

Puedes ayudar hacer una

[@MiniEngineMotor-wz5wu]

and register the vehicle as such

[@nothoughtsheadempty6220]

No

[@ravindraal6901]

Plz tell me where u purchased the dc motor and controller

[@benjaminkujavec1194]

Hello, I can get it for you. You can contact me through WhatsApp [phone]

[@scarmyguitar]

The music in this video is the most annoying thing I've ever heard but nice build

[@apageproductions]

Why battery is not inside the fuel tank? If it was it can be perfect

[@scottlees267]

too top heavy

[@troyguererro0898]

Bad weight distribution, it would be uncomfortable to steer and bank on roads.

[@powchainsamaniego6744]

There is a lot move for more batteries

[@benjaminkujavec1194]

Yes, I will make bigger battery. Stay tuned

[@krystofdvorak9918]

homologace by u toho asi neprošla že?

[@benjaminkujavec1194]

It will pass homologation, but first I have to make few modifications, waterproof everything, mudguards, E mark lights etc.

[@szentagostonka]

Why need gas tank?

[@nothoughtsheadempty6220]

Storage, styling

[@AntonioGonzalez-iu4mh]

Hay forma de contactarte

[@benjaminkujavec1194]

You can email me at: [e-mail]

[@powchainsamaniego6744]

When you are getting into electric world? I'm serious how many people are in into electric world