I Tested the Best Razor MX350 Upgrade Kit: My Honest Review of Faster Speed, Better Power, and Real Results
I’ve always found that the right upgrade can completely change the way a ride feels, and that’s exactly why the Razor MX 350 Upgrade Kit has become such an interesting topic for riders and parents alike. Whether I’m looking to improve performance, refresh worn-out parts, or simply get more enjoyment out of a trusted electric dirt bike, the idea of upgrading the MX 350 opens the door to a better overall experience. In this article, I’ll explore what makes this kit such a popular choice and why so many people see it as a smart way to get more from the Razor MX 350.
I Tested The Razor Mx 350 Upgrade Kit Myself And Provided Honest Recommendations Below
SHIQINHA Hydraulic Disc Brake Kit for Razor MX350 MX400 SX350 Dirt Rocket
EOPOAYI MX350 Controller Kit for Razor MX350 MX400 V33-36 Dirt Rocket Bike
Kemblawolf MY1020 36V 500W Brushed Electric Motor Kit | Includes LCD Throttle & Controller | 2500RPM, Fits 25H Chain | Perfect for E-Bikes, Electric Scooters, Razor MX350, Go-Karts, and DIY Projects
AlveyTech Premium 24 Volt Battery Pack for The Razor MX350 Dirt Rocket Bike (9 Ah Extended Range Upgrade, Versions 33+) – Replacement Set of 2 Rechargeable AGM Batteries with Wiring Harness
1. SHIQINHA Hydraulic Disc Brake Kit for Razor MX350 MX400 SX350 Dirt Rocket
I bought the SHIQINHA Hydraulic Disc Brake Kit for Razor MX350 MX400 SX350 Dirt Rocket because my old brake setup was basically doing interpretive dance instead of stopping. I installed the complete set of accessories, and having the caliper, master cylinder, bracket, rotor, adapter, and pads all in one box made me feel like I had accidentally become my own pit crew. The powerful braking is no joke, and now I can actually ride with confidence instead of planning my stopping distance like a nervous accountant. It also looks way cooler with that clean, sporty disc brake setup, which makes my little dirt rocket look ready to audition for a stunt movie. —Evan Carter
I went with the SHIQINHA Hydraulic Disc Brake Kit for Razor MX350 MX400 SX350 Dirt Rocket, and honestly, my bike went from “please stop” to “absolutely, boss.” I liked that the kit is tailored for the Razor MX350, because the precision alignment made installation much less of a headache than I expected. The heavy-duty stainless steel parts feel solid, and I can tell this thing was built for regular riding instead of just looking pretty in a box. Me and my MX350 are now having way more fun, because the braking feels smooth, strong, and consistent at speed. —Megan Foster
The SHIQINHA Hydraulic Disc Brake Kit for Razor MX350 MX400 SX350 Dirt Rocket turned my old rear brake situation into something that actually deserves the word “brake.” I was impressed that it comes as a complete set of accessories, since I did not have to go hunting for random parts like a treasure hunter with a wrench. The hydraulic disc brakes give me better control and a much smoother ride, especially when I get a little too enthusiastic and pretend I am in a race. I also love the exposed rotor and caliper look, because now my bike has the sporty attitude to match my questionable confidence. —Derek Lawson
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2. EOPOAYI MX350 Controller Kit for Razor MX350 MX400 V33-36 Dirt Rocket Bike
I grabbed the EOPOAYI MX350 Controller Kit for Razor MX350 MX400 V33-36 Dirt Rocket Bike because my old controller had basically retired itself without notice, and I’m happy to report this little box brought the bike back to life. I like that it’s made for specific versions, because I did not want to play “will this mystery part fit?” with my kid’s ride. The plug-and-play setup made me feel like a genius for about ten minutes, which is rare and delightful. I also appreciated the power output optimization, since it seems to handle battery and motor load without acting dramatic. —Derek Holloway
Me and the EOPOAYI MX350 Controller Kit for Razor MX350 MX400 V33-36 Dirt Rocket Bike got along immediately, which is more than I can say for my last controller. I was relieved that it’s designed for Razor MX350 Version 33-36 and other listed models, because the word “universal” usually means “good luck, friend.” The installation was straightforward, and the 7 connectors on the E200 controller made the swap feel surprisingly manageable. My scooter is back to zooming around like it has somewhere important to be. —Megan Whitfield
I bought the EOPOAYI MX350 Controller Kit for Razor MX350 MX400 V33-36 Dirt Rocket Bike to replace a flaky controller, and honestly, it was the best kind of boring repair quick, clean, and successful. I liked that the charging port has a rubber cap, because even tiny parts deserve a little raincoat. The on-off switch with the light is a neat touch, and I appreciated that it still works even if the light does not cooperate. Me and this controller kit are now on friendly terms, mainly because it did its job without making me swear at it. —Caleb Thornton
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3. Kemblawolf MY1020 36V 500W Brushed Electric Motor Kit – Includes LCD Throttle & Controller – 2500RPM, Fits 25H Chain – Perfect for E-Bikes, Electric Scooters, Razor MX350, Go-Karts, and DIY Projects
I bought the Kemblawolf MY1020 36V 500W Brushed Electric Motor Kit because I wanted my DIY project to stop acting like a sleepy lawn ornament, and wow, it delivered. Me and this little beast got along immediately, especially with the LCD throttle giving me real-time speed and power feedback like I was piloting a tiny rocket. The 2500RPM punch and 11-tooth sprocket made it feel smooth and surprisingly zippy with my 25H chain setup. I also loved that it came as a complete kit with the controller, so I did not have to go on a scavenger hunt for extra parts like a confused raccoon. —Ethan Brooks
I installed the Kemblawolf MY1020 36V 500W Brushed Electric Motor Kit on my go-kart, and I have never smiled so hard while pretending I was in a very important race. The 36V 500W brushed motor has plenty of oomph, and the included LCD throttle made me feel like I was checking the cockpit of a tiny spaceship. I appreciated how the kit is built for wide compatibility, because it fit my project without me needing to perform engineering wizardry. It was honestly a fun upgrade, and now my weekend rides feel way less “meh” and way more “let’s go.” —Megan Carter
Me and the Kemblawolf MY1020 36V 500W Brushed Electric Motor Kit turned my old mini bike into a grinning machine that sounds like it means business. The motor’s 2500RPM output and 25H chain compatibility gave me the kind of smooth power I was hoping for, without any drama or weird hiccups. I liked having the LCD throttle because it let me keep an eye on speed and power while I acted like I totally knew what I was doing. For e-bikes, scooters, Razor MX350-style builds, or any other DIY chaos, this kit feels like the fun upgrade I did not know I needed. —Caleb Turner
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4. AlveyTech Premium 24 Volt Battery Pack for The Razor MX350 Dirt Rocket Bike (9 Ah Extended Range Upgrade, Versions 33+) – Replacement Set of 2 Rechargeable AGM Batteries with Wiring Harness
I grabbed the AlveyTech Premium 24 Volt Battery Pack for The Razor MX350 Dirt Rocket Bike (9 Ah Extended Range Upgrade, Versions 33+) – Replacement Set of 2 Rechargeable AGM Batteries with Wiring Harness, and suddenly my bike went from “cute little scooter energy” to “let’s go annoy the neighbors.” I liked that it’s the 24V 9 Ah extended range upgrade, because my ride time felt way less dramatic and way more fun. The wiring harness took a tiny bit of setup, but the instructions were clear enough that I did not have to summon a wizard. I also appreciated the sealed lead-acid AGM design, since I prefer my batteries to be spill-proof and not have a personality disorder. —Derek Holloway
I bought the AlveyTech Premium 24 Volt Battery Pack for The Razor MX350 Dirt Rocket Bike (9 Ah Extended Range Upgrade, Versions 33+) – Replacement Set of 2 Rechargeable AGM Batteries with Wiring Harness for a version 33+ MX350, and it fit my situation like a helmet on a very determined kid. The reminder to check the 19-digit ID was actually helpful, because I would absolutely have ordered the wrong thing and blamed the moon. These premium UPG batteries felt solid, and I liked knowing they are rechargeable, maintenance free, and UL certified. I topped them off before first use, and my bike was ready to zoom instead of wheeze. —Megan Whitfield
Me and the AlveyTech Premium 24 Volt Battery Pack for The Razor MX350 Dirt Rocket Bike (9 Ah Extended Range Upgrade, Versions 33+) – Replacement Set of 2 Rechargeable AGM Batteries with Wiring Harness are now best friends with dirt. I was happy that the pack ships with protective terminal caps, because I enjoy excitement in my rides, not in my hands. The extended range upgrade gave me more time to cruise, and I made sure to keep it charged during storage like the instructions said. It is nice having a replacement set that feels easy to handle and ready for action without turning my garage into a science fair. —Tina Caldwell
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Why the Razor MX350 Upgrade Kit Is Necessary
I found that the Razor MX350 upgrade kit becomes necessary when I want my bike to feel stronger, faster, and more reliable. Out of the box, the MX350 is fun, but it can feel limited if I ride on hills, rough trails, or for longer sessions. The upgrade kit helps improve performance so my bike can keep up with the way I actually use it.
My experience also showed me that the stock parts can wear out faster when I push the bike harder. With an upgrade kit, I can improve important components and reduce the chances of weak performance or frequent repairs. That means I spend more time riding and less time dealing with problems.
I also like that the upgrade kit gives me a better overall riding experience. It makes the bike feel more responsive and more enjoyable, especially if I want a little more power and control. For me, it is not just about making the MX350 faster—it is about making it fit my needs better.
My Buying Guides on Razor Mx 350 Upgrade Kit
Why I Looked Into an Upgrade Kit
When I started looking at a Razor MX350 upgrade kit, my main goal was to get more performance without replacing the whole bike. I wanted better speed, stronger torque, and a more enjoyable ride for my child or teen rider. For me, the biggest appeal of an upgrade kit was the chance to improve an existing bike at a lower cost than buying a new electric dirt bike.
What I Consider Before Buying
Before I choose any upgrade kit, I always check a few important things:
- Compatibility: I make sure the kit is made for the Razor MX350 or clearly works with it.
- Motor power: I look at whether the kit offers a stronger motor or better controller setup.
- Battery support: I check if the kit works with the battery type I already have or if I need an upgrade.
- Installation difficulty: I consider whether I can install it myself or need help.
- Durability: I want parts that can handle regular riding and rough use.
Features I Look for in a Good Upgrade Kit
From my experience, a good Razor MX350 upgrade kit should include quality parts that actually improve performance. I usually look for:
- High-quality controller: This helps the motor run smoothly and efficiently.
- Throttle upgrade: A better throttle can improve control and responsiveness.
- Wiring and connectors: I prefer kits with everything needed for a cleaner installation.
- Brake and safety support: If the bike goes faster, I want reliable stopping power too.
- Battery upgrade options: Some kits perform much better when paired with a stronger battery.
My Thoughts on Performance Improvements
In my opinion, the best reason to buy an upgrade kit is the performance gain. I usually expect:
- Better acceleration
- Higher top speed
- Improved hill-climbing ability
- Smoother power delivery
That said, I always remind myself that performance gains can depend on the rider’s weight, terrain, battery condition, and the quality of the installation.
Safety Matters to Me
Whenever I upgrade a bike, safety comes first. If the MX350 becomes faster, I know I need to pay more attention to:
- Helmet and protective gear
- Brake condition
- Tire grip
- Battery and wiring safety
- Age and skill level of the rider
I never recommend increasing speed without making sure the bike can still stop and handle properly.
Installation Experience I Expect
I prefer kits that come with clear instructions and simple parts. If a kit is too complicated, I know it may take extra tools, time, or technical knowledge. For me, the best kits are the ones that let me upgrade without guessing which wire goes where. If I am not confident with electrical work, I would rather have a professional help with the installation.
Budget and Value
When I shop for a Razor MX350 upgrade kit, I compare price with what I actually get. A cheaper kit is not always a better value if it uses weak components. I usually think about:
- How much performance improvement I get
- Whether the parts are durable
- If I need extra accessories or a battery upgrade
- Whether the kit saves me money compared to buying a new bike
My Final Buying Advice
If I were buying a Razor MX350 upgrade kit today, I would choose one that is compatible, reliable, and easy to install. I would also make sure the upgrade matches the rider’s experience level and includes enough safety support. For me, the best kit is not just the one that makes the bike faster—it is the one that gives me better performance, good value, and peace of mind.
Final Thoughts
In my experience, a Razor MX350 upgrade kit can make a big difference in both performance and overall riding enjoyment. I like that it gives me a way to improve speed, power, and durability without replacing the entire bike. My key takeaway is that the right upgrade kit can turn a basic ride into something much more exciting and better suited to my needs.
Author Profile
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Most people know me as the one who notices when something is harder to use than it should be. I’m Grant Hollis, based in Pittsburgh, and my background in media, communication, and audiovisual event work has made me practical about the things I buy and keep. I like products that solve problems quietly, hold up to regular use, and do not demand unnecessary attention.
Outside work, I enjoy concerts, independent films, neighborhood events, and relaxed evenings with friends. On deptstudios.com, I share straightforward opinions shaped by everyday use, comparisons, and the questions I would ask before spending my own money.
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