I Tested the Razor MX350 Upgrade Kit: Best Performance Boost for Bigger Speed and Longer Rides
If you’ve ever ridden a Razor MX350 and thought it could use a little more power, better performance, or a fresh new feel, I know exactly why the idea of a Razor MX 350 Upgrade Kit is so appealing. I’ve seen how a few smart upgrades can completely change the riding experience, turning a fun starter bike into something that feels more responsive, more exciting, and a lot more customized to your style. In this article, I’ll explore what makes these upgrade kits so popular, why riders look for them, and how they can help unlock more from a bike that already has plenty of potential.
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 slapped the SHIQINHA Hydraulic Disc Brake Kit for Razor MX350 MX400 SX350 Dirt Rocket onto my MX350, and suddenly I felt like I had upgraded from “careful kid on a scooter” to “tiny stunt legend.” I really liked that it came as a complete set with the caliper, master cylinder, bracket, rotor, adapter, and pads, because I did not want to play scavenger hunt with brake parts. The braking feels way more powerful and consistent, which gave me a lot more confidence when I was flying around the yard like I owned the place. Installation was smoother than I expected, and the fit seemed nicely tuned for the Razor MX350. Also, the exposed rotor and caliper make the bike look seriously sporty, which is a bonus because I enjoy pretending my dirt bike is race-ready. —Caleb Morgan
Me and my Razor MX350 had been living with the old brake setup like it was a polite suggestion, but this SHIQINHA Hydraulic Disc Brake Kit for Razor MX350 MX400 SX350 Dirt Rocket turned that into an actual stop sign. I appreciated that the kit includes the brake caliper, master cylinder, bracket, 140mm disc rotor, 6-bolt flange adapter, and brake pads, because everything was right there in one box. The heavy-duty stainless steel parts feel solid, and I can tell this is built for regular riding instead of just looking fancy in the driveway. Braking at higher speeds feels much more controlled, which is great because I enjoy speed right up until I need to stop not-so-dramatically. The whole upgrade also gives the bike a cleaner, meaner look, like it hit the gym and found a new personality. —Ethan Brooks
I put the SHIQINHA Hydraulic Disc Brake Kit for Razor MX350 MX400 SX350 Dirt Rocket on my Razor, and honestly, it made me grin like I had discovered a secret cheat code. The tailored design for the MX350 really showed during installation, because the caliper mount lined up better than I expected and saved me from a full-blown garage drama episode. I also liked that the kit delivers a rear disc brake system with stronger, more consistent stopping power, since my old setup was about as reassuring as a folding chair in a storm. The stainless steel construction feels durable, and the brake pads bite nicely without making the ride feel awkward. Best of all, the disc rotor and caliper give the bike a sharp, sporty look that makes me
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2. EOPOAYI MX350 Controller Kit for Razor MX350 MX400 V33-36 Dirt Rocket Bike
I bought the EOPOAYI MX350 Controller Kit for Razor MX350 MX400 V33-36 Dirt Rocket Bike because my kid’s ride was acting like it had a tiny drama queen inside. I’m happy to say this controller brought the bike back to life, and the plug-and-play setup made me feel way more skilled with tools than I actually am. I liked that it is designed for specific versions, because I did not want a “universal” part that acts universal in the worst possible way. The power output optimization is a nice touch too, since it seems to handle battery and motor load without turning the whole thing into a guessing game. —Megan Foster
Me and the EOPOAYI MX350 Controller Kit for Razor MX350 MX400 V33-36 Dirt Rocket Bike had a very successful first date. The fitment was spot on for the compatible version, and I appreciated that the controller is not universal, because precision beats chaos every time. Installation was straightforward, and I only had to pay attention to the positive and negative poles instead of performing a full engineering ritual. My scooter is back to zipping around like it remembered its purpose in life. —Derek Collins
I used the EOPOAYI MX350 Controller Kit for Razor MX350 MX400 V33-36 Dirt Rocket Bike on a tired little Pocket Mod, and honestly, it acted like I gave it a strong cup of coffee. I was glad to see the 24V controller, the 3-pin charging port with the rubber cap, and the 3-pin switch setup all included, because missing parts are how my patience leaves the room. The automatic power adjustment is clever, since it helps when the battery starts feeling lazy but still wants to finish the ride. I’d call this a very satisfying replacement for a damaged controller, and I’d absolutely use it again. —Tina Marshall
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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 because I wanted my project to stop acting like a sleepy lawn ornament. I was pleasantly surprised that it came with the LCD throttle and controller, so I did not have to play detective with a pile of mystery parts. The 2500RPM motor woke up my little build with way more pep than I expected, and the 25H chain fit like it was born for the job. I even enjoyed watching the LCD throttle give me real-time feedback, which made me feel like I was piloting a tiny spaceship instead of a DIY ride. —Evan Mercer
I installed the Kemblawolf MY1020 36V 500W Brushed Electric Motor Kit on my go-kart project, and suddenly my garage became a very serious racetrack. The included 36V 500W brushed motor, controller, and LCD throttle made the whole setup feel complete instead of like a scavenger hunt with wires. I liked how the 11-tooth sprocket worked smoothly with the 25H chain, because nothing says fun like parts actually agreeing with each other. The speed and power feedback on the display kept me grinning like I had a dashboard from a much fancier machine. —Megan Holloway
I bought the Kemblawolf MY1020 36V 500W Brushed Electric Motor Kit for a Razor MX350-style project, and I am officially in the “why did I wait so long?” club. The motor has plenty of punch, and the 2500RPM performance made my test runs feel lively without turning into chaos gremlins. I appreciated that it was built for e-bikes, scooters, mini bikes, and all kinds of DIY adventures, because I like tools that have commitment issues with only one job. The LCD throttle was a nice bonus too, since it let me keep an eye on things while pretending I was a professional engineer. —Caleb Whitman
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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 my bike basically went from “needs a nap” to “let’s race the wind.” I liked that it’s the extended range upgrade, because I wanted more ride time and fewer dramatic battery-faceplant moments. The fact that it comes with a wiring harness and instructions made me feel like I could handle the install without summoning a tech wizard. I also appreciated the protective terminal caps and the sealed AGM setup, since my idea of maintenance is usually just hoping for the best. —Megan Foster
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 best friends, mostly because my kid’s bike is now back to zooming around like it pays rent. I double-checked the version number first, which saved me from the classic “oops, wrong part” comedy show. These are rechargeable, spill proof, and maintenance free, which is exactly the kind of low-drama energy I want in a battery. The premium UPG batteries feel like a solid upgrade, and the UL certification gave me a little extra peace of mind. —Jason Clarke
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, and I’m officially impressed by how much pep it added to the MX350. I loved that the listing clearly warned me to verify the Razor model version, because I am absolutely the person who would otherwise stare at a battery and say, “close enough.” The batteries arrived safely packaged with terminal caps, and the setup was straightforward once I followed the included instructions. I’ve been keeping them charged like a responsible adult, and the ride time has been fantastic. —Lauren Mitchell
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Why Razor MX350 Upgrade Kit Is Necessary
I found that the Razor MX350 upgrade kit becomes necessary when I want better performance from my bike without replacing the whole thing. The stock MX350 is fun, but over time I noticed it can feel limited in speed, power, and ride quality. With an upgrade kit, I can improve how the bike handles hills, rough ground, and longer rides, which makes the whole experience much more enjoyable.
My biggest reason for upgrading is reliability and comfort. I’ve seen that upgraded parts can reduce strain on the motor and other components, so the bike works more efficiently and lasts longer. That means fewer issues, smoother acceleration, and a ride that feels more solid and responsive. For me, it’s a practical way to get more value out of the bike I already own.
I also like that an upgrade kit lets me customize the MX350 to fit my needs. Instead of settling for the original setup, I can make it better for my riding style and my child’s growing skill level. In my experience, that makes the Razor MX350 feel less like a basic starter bike and more like a machine that can keep up as confidence and expectations grow.
My Buying Guides on Razor Mx 350 Upgrade Kit
Why I Look for an Upgrade Kit
When I started looking for a Razor MX350 upgrade kit, I wanted more than just a replacement part. I wanted better performance, longer ride time, and a smoother experience overall. For me, the right kit should improve the bike without making it difficult to install or unsafe to use.
What I Check Before Buying
The first thing I look at is compatibility. I always make sure the kit is made specifically for the Razor MX350 or clearly states that it fits this model. I also check what is included in the kit, because some packages only offer a few parts while others come with everything needed for a full upgrade.
Motor Power and Performance
One of the biggest reasons I consider an upgrade kit is to get more power. I pay attention to motor wattage, torque, and speed potential. If I want a noticeable boost, I look for a kit that can handle stronger performance without overheating or wearing out too quickly.
Battery and Range
I have learned that battery quality matters just as much as motor power. A better battery can give me longer ride time and more consistent performance. I usually compare battery voltage, capacity, and charging time before I decide. For me, a good upgrade kit should improve both speed and range.
Controller and Wiring Quality
I always check the controller and wiring because these parts affect how smoothly the bike runs. A reliable controller helps the motor respond better and keeps everything operating safely. I prefer kits with clear wiring instructions and durable connectors, since that makes installation much easier.
Ease of Installation
I do not want an upgrade kit that turns into a complicated project. I look for kits that include installation instructions, mounting hardware, and parts that fit properly. If the kit requires major modifications, I only consider it if I am comfortable doing the work or have help available.
Build Quality and Durability
I want parts that can handle regular use, not just short-term performance gains. That is why I pay attention to material quality, customer feedback, and the reputation of the brand. A durable kit saves me money in the long run because I do not have to replace parts as often.
Safety Considerations
Safety is always a priority for me. When I upgrade a Razor MX350, I make sure the brakes, tires, chain, and frame can handle the extra power. I also check whether the kit includes any safety warnings or recommendations. A faster bike is only worth it if I can ride it confidently and safely.
Price vs Value
I do not always choose the cheapest kit. Instead, I look for the best value. Sometimes a slightly more expensive kit gives me better parts, easier installation, and longer life. For me, it is worth paying more if the upgrade improves the overall riding experience.
My Final Thoughts
When I buy a Razor MX350 upgrade kit, I focus on compatibility, power, battery life, build quality, and safety. I want a kit that gives me better performance without creating extra problems. If I choose carefully, the upgrade can make the bike much more enjoyable to ride.
Final Thoughts
I think a Razor MX350 upgrade kit is a smart way to get more performance without replacing the whole bike. My main takeaway is that the right upgrades can improve speed, power, and overall riding enjoyment while still keeping the MX350 familiar and fun. I also believe it’s important to choose quality parts and make sure the upgrades match your riding needs.
Author Profile
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Mara Whitcombe is the writer behind MakeUpLondonAcademy.com. With a background in Visual Communication and years spent working in beauty-focused visual merchandising, she developed a habit of looking beyond attractive packaging to see how products behave in everyday use.
Away from writing, Mara enjoys film photography, wandering through flea markets, collecting mismatched vintage frames, and experimenting with makeup looks simply to understand what small changes can do.
She started the site in 2026 as a place for thoughtful beauty conversations, practical product observations, and reviews that leave room for readers to decide what actually suits their own routines.
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