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50HP Electric Conversion - Project Electrom

This is a discussion on 50HP Electric Conversion - Project Electrom within the Grom Builds forums, part of the Honda Grom Forums category; What’s up guys! New to the forum and honestly new to the grom world. I’ve always wanted one but never pulled the trigger. Until a ...

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Thread: 50HP Electric Conversion - Project Electrom

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    50HP Electric Conversion - Project Electrom

    What’s up guys! New to the forum and honestly new to the grom world. I’ve always wanted one but never pulled the trigger. Until a few weeks ago.

    I was and still am a huge supporter of Alta Motors. A company that unfortunately folded last year who made race ready electric dirt bikes. So....

    I managed to get my hands on an complete Alta Drivetrain as they where shutting down. My wheels where spinning for a few months on what to do with it. Then it hit me... Grom Time! It’s just too perfect of a combo!

    So the goal of this project is to be the fastest Grom imaginable on an unmodified chassis. I will be documenting the entire thing from idea to race results on my social media.

    Some details:
    -2019 Unmodified Grom Chassis
    -Alta Redshift Drivetrain
    -Batteries: 350v li-ion
    -Capacity: 5.8kwh
    -Range: 50+ Mile combined (estimate)
    -Horse Power: 50hp (stock)
    -Torque: 42 ft/lbs (stock)
    -Weight: 250lbs (estimate)
    -Top speed:120mph (estimate)

    Latest video: https://youtu.be/aHfxI57jozM
    Instagram: https://Instagram.com/electrobraap

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    Electric... Hmmm this should be right up Wibbly's alley

    This is going to be an interesting build,,, good luck cant wait to see how this shakes out.
    Last edited by dubSolo; 05-30-2019 at 06:30 AM.

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    Sounds cool man. Interested to see the practical range of that battery. There's only 9 mins of battery at rated output.


    The unmodified chassis makes me nervous though.


    I seriously considered building an electric but was turned off by the price of the batteries.

    I presume the alta system is AC with regen?
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    Quote Originally Posted by Wibbly View Post
    Sounds cool man. The unmodified chassis makes me nervous though.
    Agreed 50hp 120mph estimated on stock chassis, sketch as fuck...
    50-50 likes this.

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    Welcome to the forum, can't wait to see how you approach this build. Good luck
    2017 Grom
    Koso 4V GF Ported / Drowsports 181 piston / Takegawa Oil Pump, Cam Chain Tensioner, Crank Support Kit & Catch Can
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    Kitaco Clutch Cover / SMR 6 Disc Clutch & 60% Springs / Chimera Clutch Plate
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    I despise electric. We are rushing into it way too quickly.

    But I love engineering and ingenuity and lots of that is needed for this conversion. Good luck!

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    When photogromer and Wally came to San Francisco to pick up two new stock Honda Groms for their ride across the USA to Florida there was a guy that met up in San Francisco who worked for Zero Motorcycle who had a electric grom using Zero electric motor. The rear sprocket was hugh, I'm not sure how many teeth was on the rear sprocket.
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    Quote Originally Posted by CiscoSanJose View Post
    When photogromer and Wally came to San Francisco to pick up two new stock Honda Groms for their ride across the USA to Florida there was a guy that met up in San Francisco who worked for Zero Motorcycle who had a electric grom using Zero electric motor. The rear sprocket was hugh, I'm not sure how many teeth was on the rear sprocket.
    Found an article on it...

    Grom Reaper: What Zero designers get up to after hours | Bike EXIF

    50HP Electric Conversion - Project Electrom-gromzero.jpg

    "The Grom Reaper has more than double the power of a stock Grom, with 27 hp rather than a humble ten. Torque goes up by a staggering +800%, from 8 to a heady 66 ft lbs. (That’s almost as much as a Harley-Davidson Sportster 1200.)"

    "It shouldn’t work, but Cole is a designer for Zero Motorcycles, so he had a head start on the engineering front. And the resulting ‘Grom Reaper’ screams out to be turned into a kit for other owners of the Honda MSX125."

    "A Honda Grom with a lithium ion power pack and more torque than a Yamaha MT-09."



    Last edited by tooter; 05-30-2019 at 12:48 PM.
    2018 GROM:
    TOCE Dual Exhaust
    Yuminashi ECU
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    Dinger Built Extra Long Intake
    Honda Monkey Rear Sets
    Honda Monkey Front Fender
    Honda Monkey Fork Guards
    Honda Black Plastics
    G Craft Rear Rack
    Cargo Crate

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    Quote Originally Posted by Wibbly View Post
    Sounds cool man. Interested to see the practical range of that battery. There's only 9 mins of battery at rated output.


    The unmodified chassis makes me nervous though.


    I seriously considered building an electric but was turned off by the price of the batteries.

    I presume the alta system is AC with regen
    Based on experience with my other Alta (my complete dirt bike) this thing should get around 50 miles or more of regular riding. People have been known to kill the battery on these in 20 mins If they are savages though. I just don’t see that kind of load being possible on the Grom.

    It does have regen but as expected it only helps a tiny bit.

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    Thanks for the hospitality everyone. I’ve taken out life insurance since I started the project. 😇🤞

    As for the zero build, it’s aways been awesome... And I want to beat it. 😂

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