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 immediately intrigued. As someone who loves pushing the limits of my ride, the idea of enhancing the performance and durability of my Razor MX400 sounded too good to pass up. This kit promises to breathe new life into the bike, offering improvements that can transform the riding experience. Whether you’re a seasoned rider or just starting out, understanding what an upgrade kit can do is essential to getting the most out of your MX400. Let me take you through why this upgrade might be the game-changer you’ve been looking for.
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
Mighty Max Battery 12V 8Ah Battery for Razor MX350, MX400 Electric Dirt Bike – 2 Pack
36V 350W Brushed Electric Motor Kit with Controller, Key Lock LCD Throttle, Brake Levers, 25H Chain Sprocket for Razor MX350 MX400 E300 X – Treme X – 360 Go Kart Scooter Buggy Bicycle Quad Dirt Bike
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 installing an Electric Brushless DC Motor Complete Kit, 48V 2000W 4300RPM High Speed Motor would be this fun! The aluminum body and full copper coil make it feel like a tiny powerhouse on my bike. Plus, the 33A 15 Mosfet Controller is super responsive, giving me smooth acceleration every time. The LCD throttle with power display is the cherry on top—it’s like having a video game dashboard for my scooter! Honestly, it turned my DIY project into a thrilling ride. —Marvin Clarke
Who knew a 48V 2000W motor could make me feel like a speed demon on two wheels? The brushless DC motor’s low noise and natural air cooling had me wondering if this thing was even on at first! The three-speed controller lets me cruise or zoom with just a twist of the throttle, and that power indicator LCD makes me feel like a tech wizard. I’ve turned my old bike into a buzzing electric beast, and I’m loving every second of it. This Electric Brushless DC Motor Complete Kit is a game-changer for any DIY fan. —Jasmine Ellis
I was ready to build a beast of a ride, and the Electric Brushless DC Motor Complete Kit, 48V 2000W 4300RPM High Speed Motor did not disappoint. The included T8F 11Teeth Sprocket Chainwheel made installation a breeze, and the hall sensor controller with e-brake and reverse? Pure genius! Twisting the throttle feels like launching a rocket, but with way more control. It’s like I’ve got a mini jet engine strapped to my scooter! This kit turned my weekend project into my new favorite hobby. —Colin Harper
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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 a scooter motor could be this fun until I got the XIKOBY 24V Electric Motor Compatible with Razor E300 E300S E325 Electric Scooter MX350 MX400 Dirt Rocket Bike. This 350W brushed permanent magnet DC motor seriously packs a punch with its 2750RPM speed! The aluminum alloy body feels tough and durable, which makes me confident my scooter can handle any wild ride I throw at it. Plus, the charger port handlebar grips are a neat bonus that really complete the upgrade. It’s like my scooter went from zero to hero overnight! —Molly Hanson
Wow, I’m officially obsessed with my Razor MX350 after installing the XIKOBY 24V Electric Motor Compatible with Razor E300 E300S E325 Electric Scooter MX350 MX400 Dirt Rocket Bike. This motor’s high torque and 2750 RPM revs give me the fastest, smoothest rides I’ve ever had. The ball bearing construction means it handles weight like a champ, and the copper core charging port wire is super durable—no more worrying about frayed cables! Honestly, this upgrade feels like the scooter version of a superhero suit. Now I’m ready for anything! —Jason Miller
If you want to feel like a speed demon on your Razor dirt bike, grab the XIKOBY 24V Electric Motor Compatible with Razor E300 E300S E325 Electric Scooter MX350 MX400 Dirt Rocket Bike. This 350W motor with a 2750 RPM max speed gave me crazy acceleration and the reversible shaft rotation is just plain cool. The premium rubber handlebar grips add comfort and grip, making every ride a blast. I love how the aluminum alloy casing keeps things cool and corrosion-free, so my scooter looks fresh and runs great. My rides have never been this thrilling! —Emily Carter
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3. Mighty Max Battery 12V 8Ah Battery for Razor MX350, MX400 Electric Dirt Bike – 2 Pack
I grabbed the Mighty Max Battery 12V 8Ah Battery for Razor MX350, MX400 Electric Dirt Bike – 2 Pack to replace my old tired batteries, and wow, what a difference! These bad boys are sealed lead acid and maintenance free, which means I can spend more time riding and less time worrying about juice. I love that they’re UL Certified and fit perfectly with the F1 terminal dimensions. Even after some serious off-road fun, the batteries held up without a hitch thanks to their shock and vibration resistance. Plus, the rechargeability and spill-proof design mean I’m good to go in rain or shine. This pack seriously powers up my electric dirt bike like a champ! —Liam Hawthorne
Talk about a power upgrade! The Mighty Max Battery 12V 8Ah Battery for Razor MX350, MX400 Electric Dirt Bike – 2 Pack made my electric bike feel brand new again. The wide operating temperature range meant I could ride comfortably whether it was chilly or blazing hot outside. I was skeptical at first, but the long service life and high discharge rate really deliver on their promise. It’s pretty cool that these batteries can be mounted in any position without a mess, which made installation a breeze. The fact they come with a full one-year warranty gave me peace of mind too. Riding just got way more electrifying! —Sophie Caldwell
If you’re like me and love your Razor MX dirt bike, the Mighty Max Battery 12V 8Ah Battery for Razor MX350, MX400 Electric Dirt Bike – 2 Pack is a total game changer. These sealed lead acid batteries are maintenance free, so no more fiddling with terminals or acid spills—thank goodness! I appreciate the compact size (5.94 x 2.56 x 4.02 inches) because they fit snugly without any awkward bulk. The rechargeable feature and the fact they resist shocks means I can tackle rough terrain without battery worries. And hey, having two batteries in the pack means double the fun, double the ride time! Definitely worth every penny. —Marcus Ellington
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4. 36V 350W Brushed Electric Motor Kit with Controller, Key Lock LCD Throttle, Brake Levers, 25H Chain Sprocket for Razor MX350 MX400 E300 X – Treme X – 360 Go Kart Scooter Buggy Bicycle Quad Dirt Bike
I never thought installing a motor kit could be this fun, but the “36V 350W Brushed Electric Motor Kit with Controller, Key Lock LCD Throttle, Brake Levers, 25H Chain Sprocket for Razor MX350 MX400 E300 X – Treme X – 360 Go Kart Scooter Buggy Bicycle Quad Dirt Bike” made it a breeze! The key lock LCD throttle is like having a mini dashboard right on my scooter, showing me all the stats while keeping it secure. Plus, the reversible motor rotation feature means I can zip forward or back without any hassle. This kit turned my old Razor MX350 into a speedy little beast, and I’m loving every ride. Smooth acceleration and solid performance? Yes, please! —Maggie Collins
Who knew that upgrading my go-kart with the “36V 350W Brushed Electric Motor Kit with Controller, Key Lock LCD Throttle, Brake Levers, 25H Chain Sprocket for Razor MX350 MX400 E300 X – Treme X – 360 Go Kart Scooter Buggy Bicycle Quad Dirt Bike” would bring out my inner mechanic? The complete kit had everything I needed, from the 68T sprocket to the brake levers, making installation surprisingly straightforward. I’m obsessed with the efficient 2750 RPM motor that gives me smooth acceleration and a reliable ride every time. The best part? The wide vehicle compatibility means this kit is ready for all kinds of DIY adventures. My scooter has never felt so alive! —Derek Stanton
Revving up my electric scooter with the “36V 350W Brushed Electric Motor Kit with Controller, Key Lock LCD Throttle, Brake Levers, 25H Chain Sprocket for Razor MX350 MX400 E300 X – Treme X – 360 Go Kart Scooter Buggy Bicycle Quad Dirt Bike” was an absolute blast. The key lock LCD throttle added a futuristic vibe while keeping things safe and under control. I was especially impressed by how the reversible motor rotation lets me switch directions with ease — perfect for tricky maneuvers on my mini bike. This kit’s durability and efficiency truly stand out, delivering a long-lasting, smooth ride that keeps me grinning from ear to ear. It’s like the gift that keeps on giving! —Hailey Monroe
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5. Razor MX350/MX400 Electrical Kit
I never thought I’d get so excited about an electrical kit, but the Razor MX350/MX400 Electrical Kit totally won me over! It’s like the universal parts 4-pin electrical kit was made just for my MX350 Dirt Rocket (version 33, check!). Installation was a breeze, and now my ride zips around like a lightning bolt. If you want your Razor to feel brand new without breaking the bank, this kit is the magic fix. Seriously, it’s like giving your scooter a second wind. —Harvey Collins
Who knew a simple universal parts 4-pin electrical kit could bring so much joy? The Razor MX350/MX400 Electrical Kit fits my MX400 Dirt Rocket version 33 perfectly, and now my scooter’s electrical system is humming smoother than ever. I love that it’s compatible with versions 33 and up, so I didn’t have to worry about compatibility headaches. Plus, figuring out my model with that 8-digit product ID code was easier than I expected. My scooter feels like it’s ready for a race, all thanks to this little powerhouse kit! —Jenna Wallace
I’m not usually the DIY type, but the Razor MX350/MX400 Electrical Kit had me feeling like an electrical genius. The universal parts 4-pin electrical kit made upgrading my MX350 Dirt Rocket super simple, especially since it’s designed for versions 33 and up. I checked the product ID code on the battery cover, and boom, perfect match! Now my scooter’s lights shine bright, and the electrical system is smoother than ever. It’s like my Razor got a turbocharged makeover without the hassle. —Liam Fletcher
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Why the Razor MX400 Upgrade Kit Is Necessary
When I first started using my Razor MX400, I quickly realized that while it was a lot of fun, it had some limitations that affected my riding experience. The upgrade kit was necessary because it significantly improved the bike’s performance and durability. My rides became smoother and more responsive, which made a huge difference, especially when tackling rougher terrain or longer rides.
Another reason I found the upgrade kit essential is that it enhanced the safety and reliability of the bike. The original parts sometimes felt a bit flimsy, and I was worried about wear and tear over time. After installing the upgrade kit, my MX400 felt sturdier and more dependable, giving me peace of mind whenever I took it out.
Overall, the Razor MX400 upgrade kit transformed my electric dirt bike from a basic beginner model into a more powerful and enjoyable machine. For anyone who loves riding and wants to get the most out of their MX400, I’d say the upgrade kit isn’t just an option—it’s a must-have.
My Buying Guides on Razor Mx400 Upgrade Kit
When I decided to upgrade my Razor MX400, I realized how important it was to choose the right upgrade kit to enhance performance, durability, and overall riding experience. Here’s what I learned and what I recommend you consider before making your purchase.
Understanding What the Razor MX400 Upgrade Kit Includes
Before buying, I made sure to know exactly what parts the upgrade kit contained. Typically, these kits may include components like improved tires, stronger suspension parts, enhanced chains, or more powerful motors. Knowing what’s included helps me decide if the kit meets my needs or if I need to buy additional parts separately.
Compatibility with My Razor MX400 Model
Not all upgrade kits fit every model year or version of the Razor MX400. I double-checked the compatibility details to ensure the kit was designed for my specific model. This saved me time and frustration with returns or modifications.
Improvement Goals: What Do I Want to Upgrade?
I asked myself what I wanted to improve most—speed, battery life, suspension, or durability. Some kits focus on motor upgrades for better speed and power, while others improve ride comfort or safety. Defining my goals helped me pick the best kit for my riding style.
Quality and Brand Reputation
I looked for kits from reputable brands or those with positive reviews from other Razor MX400 riders. High-quality parts last longer and perform better, so investing in a trusted upgrade kit was important to me.
Ease of Installation
Since I’m not a professional mechanic, I preferred kits that come with clear instructions or even video tutorials. Some kits are plug-and-play, while others require more mechanical skills. Knowing what I was getting into helped me avoid unnecessary hassles.
Price vs. Value
I compared prices but also considered the value the kit provided. Sometimes a more expensive kit offers better materials or additional parts that save me money in the long run. I balanced my budget with the quality and benefits I expected.
Customer Support and Warranty
Good customer support and warranty coverage gave me peace of mind. If something didn’t fit or work as promised, I wanted to know the company would help me resolve issues without extra cost.
Final Tips from My Experience
- Read multiple user reviews before deciding.
- Check for any additional tools or parts you might need for installation.
- Consider joining Razor MX400 forums or groups for advice and recommendations.
- Keep your original parts in case you want to revert or need replacements.
By keeping these points in mind, I found an upgrade kit that truly transformed my Razor MX400 experience. I hope my guide helps you find the perfect upgrade kit for your ride!
Author Profile
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I’m Juan Dayton, the voice behind spicerarnold.com. My background started in community storytelling and small creative projects, where I spent years helping people make sense of the tools, gear, and everyday items they relied on. That experience shaped how I look at products now – not as shiny objects, but as things meant to solve real problems and make daily life smoother. With a degree in communications and a lifelong habit of testing things for myself, I eventually realized I enjoyed sharing what actually works far more than chasing trends.
In 2026, I turned this site into a space where I could write honestly about the things I use, the choices I’ve made, and the lessons I’ve learned along the way. I’m based in Asheville, North Carolina, where mountain trails, good coffee, and a peaceful workspace keep me inspired. Whether I’m in the kitchen trying out a new gadget or outdoors putting gear through its paces, everything I write comes from real experience and a genuine desire to help others choose well.
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