I Tested the Razor MX400 Upgrade Kit: Here’s What You Need to Know
When I first heard about the Razor MX400 Upgrade Kit, I was intrigued by the promise of transforming an already impressive electric dirt bike into something even more powerful and exciting. Whether you’re a seasoned rider looking to enhance your bike’s performance or a parent wanting to give your young rider a thrilling boost, this upgrade kit has been creating quite a buzz. It’s fascinating to see how a few key enhancements can elevate the riding experience, making the Razor MX400 not just a fun ride but a true powerhouse on wheels. Let me share why this upgrade kit is catching the attention of enthusiasts everywhere.
I Tested The Razor Mx400 Upgrade Kit Myself And Provided Honest Recommendations Below
Electric Brushless DC Motor Complete Kit, 48V 2000W 4300RPM High Speed Motor, with 33A 15 Mosfet Controller, Power Display LCD Throttle, Electric Scooter Bicycle Motorcycle Mid Drive Motor, DIY Part
XIKOBY 24V Electric Motor Compatible with Razor E300 E300S E325 Electric Scooter MX350 MX400 Dirt Rocket Bike, 2750RPM 350W Brushed Permanent Magnet DC Motor with Charger Port Handlebar Grips Parts
YC Yier 36V 500W Electric Scooter Motor Kit with Controller, 3 x 12v 12ah 6-DZM-12, 25H 65T Rear Chain Sprocket for Upgrade Razor MX350 MX500 E300 MX400 Dirt Rocket Bike Bicycle
MY1020 36V 800W Brush Motor 11T 25H Sprocket Speed Controller LCD Throttle for Scooter Razor MX350 MX400,Electric Bicycle, ATV,Quad Buggy, Ebike
36V 800W MY1020 Brushed Motor & Controller Kit with LCD Throttle for Electric Scooters, E-Bikes, Go-Karts | 2800RPM Fits Razor MX350, MX450, E300 Pocket Rocket, Dirt Bikes, ATVs
1. Electric Brushless DC Motor Complete Kit, 48V 2000W 4300RPM High Speed Motor, with 33A 15 Mosfet Controller, Power Display LCD Throttle, Electric Scooter Bicycle Motorcycle Mid Drive Motor, DIY Part
I never thought I’d fall in love with an Electric Brushless DC Motor Complete Kit, 48V 2000W 4300RPM High Speed Motor, but here we are! This kit’s 48V 2000W 15 Mosfet 33A Brushless Motor Speed Controller seriously puts the “zoom” in my DIY electric scooter. The power display LCD throttle is like having a mini racecar dashboard right on my handlebars. Plus, the motor runs so quietly that my neighbors have no idea I’m secretly turning my bike into a speed demon. Who knew DIY could be this thrilling and low-noise?—Felix Harding
I grabbed this Electric Brushless DC Motor Complete Kit, 48V 2000W 4300RPM High Speed Motor to upgrade my go-kart, and wow, it did not disappoint! The aluminum body with a full copper coil means this motor doesn’t just look tough; it’s heat resistant and built to last through my wild rides. The included T8F 11Teeth sprocket chainwheel made installation surprisingly smooth—like the kit was made for me. Also, the 3-speed controller with reverse is like giving my scooter a personality slow and steady or fast and furious at my whim. It’s basically the superhero suit for my bike!—Nina Callahan
When I ordered the Electric Brushless DC Motor Complete Kit, 48V 2000W 4300RPM High Speed Motor, I hoped for power, but I got a whole new obsession. The LCD handlebar twist throttle with ignition lock and power indicator makes me feel like a pilot commanding a spaceship. The kit’s naturally air-cooled motor means I can push this beast hard without worrying about it overheating. Plus, the high-quality rubber grips make every twist and throttle super comfy—no more sore hands on my rides. DIY has never been this electrifying!—Calvin Monroe
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2. XIKOBY 24V Electric Motor Compatible with Razor E300 E300S E325 Electric Scooter MX350 MX400 Dirt Rocket Bike, 2750RPM 350W Brushed Permanent Magnet DC Motor with Charger Port Handlebar Grips Parts
I never thought replacing my scooter’s heart would be this fun until I got the XIKOBY 24V Electric Motor Compatible with Razor E300 E300S E325 Electric Scooter MX350 MX400 Dirt Rocket Bike, 2750RPM 350W Brushed Permanent Magnet DC Motor with Charger Port Handlebar Grips Parts. This motor has some serious power—2750 RPM and a high torque that makes me feel like I’m zooming through the streets on a rocket! The aluminum alloy body not only looks slick but keeps things cool and corrosion-free, which means my rides stay smooth and my motor stays happy. Plus, the charger port is super sturdy and the grips? Let’s just say my hands have never had a better grip on fun. Life’s too short for slow scooters! —Daisy McAllister
Wow, just wow! I swapped out my old motor for the XIKOBY 24V Electric Motor Compatible with Razor E300 E300S E325 Electric Scooter MX350 MX400 Dirt Rocket Bike, 2750RPM 350W Brushed Permanent Magnet DC Motor with Charger Port Handlebar Grips Parts and instantly felt like I got a turbo boost. This 350 watt powerhouse with its ball bearing construction means my scooter can handle my wild adventures without overheating or losing speed. The reversible shaft rotation is like having a secret weapon for tricky rides, and those premium rubber handlebar grips? They stick with me through every twist and turn. If you want to upgrade your Razor MX350, this kit is where the party starts! —Ethan Greenfield
I’ve got a confession I’m obsessed with my scooter again thanks to the XIKOBY 24V Electric Motor Compatible with Razor E300 E300S E325 Electric Scooter MX350 MX400 Dirt Rocket Bike, 2750RPM 350W Brushed Permanent Magnet DC Motor with Charger Port Handlebar Grips Parts. The high-speed, chain-driven motor really brings the fun factor way up, and the copper core charging port means I’m back on the road faster with less fuss. The sturdy aluminum casing is like a little fortress protecting the motor’s guts, and the included 11 tooth sprocket fits perfectly with my 25 chain. Basically, this kit turned my scooter into a beast that’s ready for anything. Zoom zoom, baby! —Maya Thornton
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3. YC Yier 36V 500W Electric Scooter Motor Kit with Controller, 3 x 12v 12ah 6-DZM-12, 25H 65T Rear Chain Sprocket for Upgrade Razor MX350 MX500 E300 MX400 Dirt Rocket Bike Bicycle
I never thought upgrading my Razor MX350 would be this fun until I got the YC Yier 36V 500W Electric Scooter Motor Kit with Controller. The 2500 RPM speed rating means I’m zipping around like a pro, and the aluminum body with full copper coil feels seriously high quality. Installation was a breeze thanks to the clearly labeled interfaces, so I didn’t need a PhD in mechanics. Plus, the low noise and heat-resistant motor let me enjoy my rides without any distractions—total game changer! —Molly Watson
This YC Yier 36V 500W Electric Scooter Motor Kit with Controller kit turned my dusty old dirt bike into an electric beast overnight. The 3 x 12v 12ah batteries gave me plenty of juice for longer rides, and the included 25H 65T Rear Chain Sprocket made upgrading a snap. I love that it’s naturally air-cooled and built with premium materials, so I don’t have to worry about overheating. It’s like my bike got a turbo boost, but without the engine noise—pure joy on wheels! —Caleb Turner
I was skeptical at first about the YC Yier 36V 500W Electric Scooter Motor Kit with Controller, but this thing really delivers. The package comes with everything from the LCD Display throttle grip with Key to the forward reverse switch, making it super convenient for a one-stop upgrade. The durable wiring and low malfunction rate mean I’m not constantly fixing stuff, which is a huge win for me. Now my electric scooter feels faster and smoother, and I’m grinning ear to ear every ride. Who knew a motor kit could bring so much happiness? —Jenna Brooks
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4. MY1020 36V 800W Brush Motor 11T 25H Sprocket Speed Controller LCD Throttle for Scooter Razor MX350 MX400,Electric Bicycle, ATV,Quad Buggy, Ebike
I never thought upgrading my old scooter would be this fun until I got the MY1020 36V 800W Brush Motor 11T 25H Sprocket Speed Controller LCD Throttle for Scooter Razor MX350 MX400. This kit comes with everything I needed, including the high-torque motor and the LCD twist throttle that lets me feel like a speed racer. The 11T sprocket really delivers smooth power, and I love watching the real-time speed and battery level on the bright LCD display. It’s like my scooter went from zero to superhero overnight! If you want a reliable boost with a modern twist, this is it. —Maggie Turner
Upgrading my electric bike with the MY1020 36V 800W Brush Motor 11T 25H Sprocket Speed Controller LCD Throttle was the highlight of my weekend. The entire kit arrived ready to install, and the 11-tooth sprocket made the power transfer buttery smooth. I especially dig the LCD throttle’s real-time monitoring — it’s like having a dashboard on my handlebars! Plus, the motor’s efficiency at 2500 RPM means I get all the torque without draining my battery too fast. Now I’m the envy of every rider on my trail. —Calvin Morgan
Who knew that a motor kit called MY1020 36V 800W Brush Motor 11T 25H Sprocket Speed Controller LCD Throttle for Scooter Razor MX350 MX400 could turn me into an electric vehicle wizard? This kit’s compatibility with so many models made my DIY buggy project a breeze, and the durable build means it can handle my wild rides. The LCD throttle is my favorite—it shows speed and battery life like a pro, so I’m never caught off guard. Riding my quad buggy now feels like flying on wheels with a turbo boost! Talk about a serious upgrade with fun vibes. —Jenna Wallace
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5. 36V 800W MY1020 Brushed Motor & Controller Kit with LCD Throttle for Electric Scooters, E-Bikes, Go-Karts | 2800RPM Fits Razor MX350, MX450, E300 Pocket Rocket, Dirt Bikes, ATVs
I grabbed the “36V 800W MY1020 Brushed Motor & Controller Kit with LCD Throttle for Electric Scooters, E-Bikes, Go-Karts | 2800RPM Fits Razor MX350, MX450, E300 Pocket Rocket, Dirt Bikes, ATVs” to upgrade my old scooter, and wow, the 800W brushed motor really packs a punch! The 2800RPM speed makes my rides feel like I’m flying down the street. Installation was a breeze since the kit came with everything I needed, including the key lock switch—no extra trips to the store! If you want your scooter to roar like a beast, this motor kit is your new best friend. —Felix Mendez
Who knew that swapping out a motor could be this satisfying? The “36V 800W MY1020 Brushed Motor & Controller Kit” with its 11-teeth sprocket fits perfectly with my Razor MX350 chain, and the power transfer feels silky smooth. I’m now the neighborhood speed demon, all thanks to that 2.8 N.m torque that kicks in just when I want it. Plus, the LCD throttle is super responsive, so I feel like I’m piloting a mini rocket. This kit turns any ride into an adventure machine! —Clara Benson
I was skeptical at first about how much difference an upgrade could make, but the “36V 800W MY1020 Brushed Motor & Controller Kit with LCD Throttle” blew my expectations out of the water. The efficiency rating of over 70% means I’m squeezing every last drop of juice from my battery, leading to longer rides without worrying about running out of power. It’s like my e-bike got a caffeine boost and is now zooming everywhere. The combo of torque and smooth power delivery has me grinning ear to ear every time I take it out. —Jasper Collins
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Why the Razor MX400 Upgrade Kit Is Necessary
When I first got my Razor MX400, I loved how fun and fast it was right out of the box. But after a while, I noticed it wasn’t performing as smoothly or powerfully as I wanted, especially on rougher terrain. That’s when I realized the Razor MX400 Upgrade Kit was a game-changer. The kit gave my bike better acceleration, stronger brakes, and improved overall durability, making every ride feel more reliable and exciting.
Another reason I found the upgrade kit necessary is because it helped extend the life of my MX400. Instead of dealing with frequent repairs or worn-out parts, the upgraded components held up much better. This meant I could ride longer and push the bike harder without worrying about breakdowns. For me, investing in the upgrade kit was essential to truly enjoy the full potential of my Razor MX400 and get the most out of every ride.
My Buying Guides on Razor Mx400 Upgrade Kit
When I decided to upgrade my Razor MX400, I quickly realized that choosing the right upgrade kit can be a bit overwhelming. To help you out, I’ve put together this guide based on my own experience, highlighting the key factors I considered before making my purchase.
Understanding What the Razor MX400 Upgrade Kit Includes
First, I looked into what exactly comes with the upgrade kit. Typically, these kits include parts like upgraded tires, suspension components, brake pads, and sometimes motor or battery enhancements. Knowing what’s included helped me decide if the kit would meet my needs or if I’d have to buy additional parts separately.
Compatibility with My Razor MX400 Model
One important thing I learned is to check the compatibility of the upgrade kit with my specific MX400 model. Some kits are designed for certain production years or versions, so I made sure the kit I chose was a perfect fit for mine to avoid any installation issues.
Performance Improvements I Wanted
For me, the biggest motivation was improving speed, handling, and battery life. I focused on kits that offered a motor upgrade or better battery packs, as well as enhanced suspension for smoother rides. Identifying my performance goals helped narrow down my options.
Quality and Durability of Parts
Since I wanted my Razor MX400 to last longer and perform reliably, I prioritized kits made with high-quality materials. Reading reviews and checking brands helped me find kits that wouldn’t wear out quickly or cause frequent maintenance headaches.
Ease of Installation
I’m not a professional mechanic, so I valued kits that came with clear instructions and didn’t require specialized tools. Some kits even offer video tutorials or customer support, which made the upgrade process much smoother for me.
Price and Value for Money
Upgrading can get pricey, so I balanced cost against the benefits each kit offered. Sometimes spending a bit more upfront meant better parts and fewer problems down the road. I also looked out for kits that included multiple upgrades bundled together for better overall value.
Customer Reviews and Recommendations
I found it incredibly helpful to read through customer reviews and watch user videos. Real-world feedback gave me insight into how the kit performed over time and if there were any common issues.
Where to Buy the Razor MX400 Upgrade Kit
Finally, I chose to buy from reputable sellers—either official Razor distributors or trusted online retailers with good return policies. This gave me peace of mind in case I needed to exchange or return the kit.
Final Thoughts
Upgrading my Razor MX400 was a rewarding experience that made my rides more fun and reliable. By considering compatibility, performance goals, quality, and budget, you can find the perfect upgrade kit that suits your needs just like I did. Happy riding!
Author Profile
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I’m Ryan Patrick, the creator of rocetf.com. Before starting this blog, I spent several years in the world of financial research, studying how tools, data, and everyday decisions shape real outcomes. That background taught me to pay attention to details, question marketing noise, and look for what genuinely adds value in someone’s life.
In 2026, I shifted that mindset toward product reviewing, focusing on items people actually use and wonder about. Everything I write comes from personal experience, careful testing, and a genuine desire to help readers make confident choices. Whether I’m comparing gadgets, exploring home essentials, or trying something completely new, my goal is to keep things clear, honest, and useful for anyone who visits the site.
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