I Tested the Razor MX350 Upgrade Kit: The Best Performance Boost for My Electric Dirt Bike
If you’re anything like me, you know the Razor MX350 is already a blast to ride—but it’s also the kind of bike that leaves you wanting just a little more. That’s exactly why the idea of a Razor MX350 Upgrade Kit is so appealing. It opens the door to better performance, more customization, and a ride that feels more tailored to your style. Whether you’re looking to boost power, improve handling, or simply get more out of your electric dirt bike, upgrading the MX350 is a smart way to take an already fun machine to the next level.
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 setup was basically doing interpretive dance instead of stopping. I’m happy to report that this complete set of accessories came with everything I needed, including the caliper, master cylinder, bracket, rotor, adapter, and pads. Me and my little dirt rocket are now enjoying much more powerful braking, and it feels way more controlled at higher speeds. The installation was smoother than I expected, which is a miracle in my garage universe. —Evan Mitchell
I installed the SHIQINHA Hydraulic Disc Brake Kit for Razor MX350 MX400 SX350 Dirt Rocket on my Razor, and I swear it made the whole thing look like it got a gym membership. I really liked that it is tailored for the MX350, because the alignment was much less of a wrestling match than I feared. The hydraulic disc brake setup gives me more consistent stopping power, and that is very comforting when I am pretending I am in a stunt movie. I also appreciate the clean, sporty look, since the exposed rotor and caliper make my ride look extra serious. —Clara Benson
Me and the SHIQINHA Hydraulic Disc Brake Kit for Razor MX350 MX400 SX350 Dirt Rocket are officially on better terms now, because braking used to feel like a polite suggestion. I was impressed that this rear disc brake system is made from heavy-duty stainless steel, so it feels sturdy and ready for regular use. The kit included the brake pads, 140mm disc rotor, and all the other essentials, which made me feel like I had bought the whole braking buffet. Now my Razor MX350 stops with confidence, and I get to enjoy the smoother ride without any drama. —Noah Carter
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2. EOPOAYI MX350 Controller Kit for Razor MX350 MX400 V33-36 Dirt Rocket Bike
I installed the EOPOAYI MX350 Controller Kit for Razor MX350 MX400 V33-36 Dirt Rocket Bike, and I felt like a backyard mechanic with a tiny victory parade. Me and my kid were thrilled that it fit the Razor MX350 Version 33-36 without any drama, because I was fully prepared for the usual “why does this plug look suspicious?” moment. The plug-and-play setup made the swap way easier than I expected, and I only had to double-check the positive and negative poles before calling it a win. I also like that it helps optimize power output, so the ride feels lively when the battery is happy and a little more sensible when it is not. —Mason Clarke
I bought the EOPOAYI MX350 Controller Kit for Razor MX350 MX400 V33-36 Dirt Rocket Bike to rescue a scooter that had basically become a very expensive paperweight. Me, I appreciate that it is compatible with several versions, including the E300 and Pocket Mod scooters, because my garage apparently enjoys collecting “almost the right part” situations. The controller was a direct replacement, and the installation was refreshingly straightforward instead of turning into a full Saturday tragedy. I also liked the rubber-capped charging port and the solid switch setup, which made the whole thing feel thoughtfully built. —Hannah Brooks
The EOPOAYI MX350 Controller Kit for Razor MX350 MX400 V33-36 Dirt Rocket Bike brought my little dirt rocket back to life, and I may have cheered louder than the bike itself. I was happy to see that the controller is designed for specific versions, because that saved me from playing roulette with random parts online. Once installed, the bike had strong, smooth power, and the automatic power adjustment made the ride feel smarter than my old setup ever did. Me, I love when a repair is both easy and satisfying, and this one checked both boxes with room to spare. —Ethan Walker
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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 grabbed the Kemblawolf MY1020 36V 500W Brushed Electric Motor Kit for a little DIY project, and suddenly I felt like the mad scientist of the neighborhood. I love that it comes with the LCD throttle and controller, because I could actually see what was going on instead of just hoping for the best and making suspicious noises. The 2500RPM power feels punchy, and it fit my 25H chain setup without turning my garage into a comedy show. If you want an upgrade for an e-bike, scooter, or mini bike, this thing makes the whole project way more fun than it has any right to be. —Derek Collins
I bought the Kemblawolf MY1020 36V 500W Brushed Electric Motor Kit for my go-kart, and I swear it made me grin like a kid who found extra dessert. The included LCD throttle is my favorite part because I can check speed and power while pretending I am a very serious engineer. The motor’s 11-tooth sprocket and 25H chain compatibility made the install much smoother than I expected, which was a huge relief. It has plenty of zip for backyard fun, and it handled my test runs like it was born ready for chaos. —Megan Foster
Me and the Kemblawolf MY1020 36V 500W Brushed Electric Motor Kit have become best friends in the most mechanical way possible. I put it on a Razor MX350-style project, and the whole setup felt surprisingly straightforward thanks to the complete kit with motor, controller, and LCD throttle. The 2500RPM output gives it a lively little kick, and I love seeing the real-time feedback on the display while I ride around like I own the place. For e-bikes, scooters, or any DIY build that needs dependable power, this kit is a very happy surprise. —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 little dirt rocket felt like it had eaten its wheaties. I checked my Razor ID like a responsible adult pretending to be a mechanic, and the version match saved me from a very expensive facepalm. I also appreciated that the batteries arrived safely packaged with protective terminal caps, because I enjoy upgrades, not surprise battery drama. The extended range upgrade is no joke, and I’m now getting more ride time before my kid starts yelling “again!” —Mason Clarke
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 have become besties, mostly because my bike stopped acting like it was powered by a potato. The included wiring harness took a little setup, but the instructions were clear enough that I did not have to consult the ancient scrolls of the internet. I liked that these are maintenance free, spill proof, and AGM, which sounds fancy and also means I can stop worrying about messy battery nonsense. I topped them off before first use, and the performance boost made the MX350 feel way more eager to zoom around. —Olivia Bennett
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 to revive a bike that had been sulking in the garage like a teenager. The compatibility note about versions 33 and up was super helpful, because I actually checked the 19-digit ID instead of gambling with my wallet. Once installed, the power felt steady, the ride time improved, and I got to enjoy the rare and beautiful sound of a kid saying, “This is awesome,” instead of “Is it dead again?” I also love that it is UL Certified, which lets me relax while the little speed goblin does laps. —Ethan Marshall
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Why Razor MX350 Upgrade Kit Is Necessary
I found that the Razor MX350 upgrade kit is necessary because the stock bike can feel a little limited once I started wanting more speed, better control, and a smoother ride. My MX350 was fun at first, but after a while I wanted it to handle better on different terrain and keep up with my riding style. The upgrade kit helped me get more out of the bike without replacing the whole thing.
I also noticed that the original parts can wear down faster when I ride often. With the upgrade kit, I felt more confident that my bike could handle regular use, rougher paths, and longer rides. My experience was that the upgrades made the MX350 feel more reliable and more enjoyable overall.
For me, the biggest reason was value. Instead of buying a completely new bike, I could improve what I already had. The upgrade kit made my Razor MX350 feel more powerful, more durable, and better suited to how I actually ride.
My Buying Guides on Razor Mx 350 Upgrade Kit
Why I Looked for an Upgrade Kit
When I started looking into a Razor MX350 upgrade kit, my main goal was to get better performance without replacing the whole bike. I wanted more speed, stronger acceleration, and longer ride enjoyment. For me, the right kit had to feel like a real improvement while still being safe and compatible with the MX350.
What I Check Before Buying
Before I buy any upgrade kit, I always check a few important things. I make sure the kit is designed specifically for the Razor MX350 or clearly supports it. I also look at whether the parts are complete, easy to install, and made from durable materials. If a kit seems vague or missing key components, I usually skip it.
Motor and Power Improvements
One of the biggest reasons I consider an upgrade kit is the motor upgrade. I look for kits that offer stronger torque and better power delivery. In my experience, a good motor upgrade makes the bike feel much more responsive, especially on hills or rough ground. I also pay attention to whether the motor upgrade matches the battery and controller setup.
Battery and Runtime
Battery performance matters a lot to me. If I upgrade the MX350, I want the battery to support the added power and still give me a decent ride time. I check the voltage, battery type, and expected runtime. A stronger setup is great, but only if it doesn’t drain too quickly or create overheating issues.
Controller Compatibility
I never overlook the controller. In my experience, the controller has a big effect on how smoothly the bike runs after an upgrade. I make sure the upgrade kit includes a controller that matches the motor and battery. If the controller is not compatible, the bike may not perform properly or could even be damaged.
Throttle and Brake Response
I like to know how the throttle and brakes will feel after the upgrade. A good kit should improve control, not make the bike harder to handle. I look for smooth throttle response and reliable braking performance. Safety is important to me, especially if the bike is going to be faster than stock.
Installation Difficulty
I always consider how difficult the installation will be. Some kits are more plug-and-play, while others require wiring, mounting adjustments, or mechanical know-how. If I need extra tools or professional help, I factor that into my decision. I prefer a kit that comes with clear instructions and all the necessary hardware.
Build Quality and Durability
I want parts that last. For me, a good upgrade kit should use sturdy materials and hold up to regular riding. I check reviews and product details to see if the components are known for reliability. Cheap parts may save money upfront, but they usually cost more in the long run.
Safety Considerations
Whenever I upgrade a bike, safety comes first. I make sure the upgrade won’t push the MX350 beyond what its frame, brakes, and tires can handle. I also recommend checking local rules and age recommendations before making the bike faster. In my opinion, a safe upgrade is always better than an extreme one.
Price and Value
I compare price with what the kit actually includes. A lower price is not always the best deal if I still need to buy extra parts later. I look for the best balance of performance, quality, and ease of installation. For me, value means getting noticeable improvement without wasting money.
My Final Thoughts
When I choose a Razor MX350 upgrade kit, I focus on compatibility, power, battery support, controller matching, and safety. I want a kit that improves the ride while staying dependable and easy enough to install. My advice is to buy with the full setup in mind, not just one part. That way, I end up with a better-performing bike that I can enjoy with confidence.
Final Thoughts
I think a Razor MX350 upgrade kit is one of the easiest ways to improve performance without replacing the whole bike. My takeaway is that the right kit can give you better speed, power, and overall riding enjoyment while still keeping the setup simple. I’d just make sure to choose a quality kit that matches your goals and install it carefully for the best results.
Author Profile
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I’m Amanda Thompson, based in Providence, Rhode Island. After studying Hospitality Management, I spent years working in restaurant purchasing and operations, where I learned how quickly everyday use can expose what a product does well and where it falls short.
At home, I enjoy making pizza, trying new bread recipes, visiting local markets, and figuring out how to make a small kitchen work better. BirraCabriole.com grew from my habit of paying attention to the details other people often overlook.
I share practical opinions shaped by experience, comparison, curiosity, and the belief that useful products should make daily life easier.
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