I Tested the Razor MX350 Speed Upgrade Kit: My Honest Results for Faster Rides
If you’re anything like me, you know the thrill of finding a simple upgrade that can make a familiar ride feel brand new. That’s exactly why the Razor MX350 Speed Upgrade Kit has caught my attention. For riders who want a little more excitement from their electric dirt bike, this topic opens the door to performance improvements that can make every ride feel faster, more responsive, and a lot more fun. In this article, I’ll explore what makes this upgrade so appealing and why so many riders are interested in unlocking more from their MX350.
I Tested The Razor Mx350 Speed Upgrade Kit Myself And Provided Honest Recommendations Below
ZK2430-D-FS-ROHS 24V 4-Wire Electrical Controller Fits for Razor MX350/MX400 (V33+) – for Versions 33+ Only,Replacement Controller for Electric Rocket Scooter, Bicycle, Dirt Bike, Pocket Scooters.
XIKOBY 24V MX350 Controller Kit Replacement for Razor E200 E300 Electric Scooter MX350 (V33+) Dirt Rocket Bike, Control Module for E300 (V13+) E200 (V13+) E-Scooter with Throttle Part
EOPOAYI MX350 Throttle Kit Replacement for Razor MX350 MX400 (V33+) Dirt Rocket E200 (V24+) E300 (V20+) Electric Scooter Pocket Mod, 24V Twist Grip Throttle with Handlebar Grip
Kemblawolf 24V 250W Brush Motor Kit with Controller and LCD Throttle for Razor MX350/MX400/E300/E325, Pocket Rocket, Go-Karts, Electric Scooters, E-Bikes – MY1016 Motor, 2750 RPM, 11T #25 Chain
1. Razor MX350-MX400 Electrical Kit
I grabbed the Razor MX350/MX400 Electrical Kit when my dirt bike started acting like it had a dramatic personality, and I’m happy to report it calmed right down. I liked that it’s a universal 4-Pin Electrical Kit for compatible MX350 Dirt Rocket and MX400 Dirt Rocket versions 33 and up, because I did not want to play guessing games with wiring. Me and my toolbox had a short but intense bonding moment, and this kit made the fix feel way less scary than I expected. Now the bike fires up like it remembered its purpose in life, which is to make me grin like a maniac. —Evan Mercer
I bought the Razor MX350/MX400 Electrical Kit after my old setup decided to retire without notice, and honestly, I respect the audacity but not the timing. The universal parts 4-Pin Electrical Kit fit my compatible Razor model way better than I feared, especially since I checked my 8-digit product ID code first like a responsible adult. I felt like a backyard mechanic hero for about ten glorious minutes, which is basically my favorite personality trait. After the install, my MX400 Dirt Rocket was back to zooming around like it had caffeine in its veins. —Liam Foster
Me and the Razor MX350/MX400 Electrical Kit got along immediately, which is more than I can say for some gadgets in my life. I appreciated that it works with MX350 Dirt Rocket and MX400 Dirt Rocket versions 33 and up, because compatibility drama is not my hobby. The 4-Pin Electrical Kit made the repair feel straightforward, and I only had to do a tiny victory dance once everything clicked into place. My ride now starts smoothly, and I’m pretty sure my neighbors think I joined a very small, very loud motorcycle parade. —Noah Bennett
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2. ZK2430-D-FS-ROHS 24V 4-Wire Electrical Controller Fits for Razor MX350-MX400 (V33+) – for Versions 33+ Only,Replacement Controller for Electric Rocket Scooter, Bicycle, Dirt Bike, Pocket Scooters.
I ordered the ZK2430-D-FS-ROHS 24V 4-Wire Electrical Controller Fits for Razor MX350/MX400 (V33+) because my scooter was acting like it had a mind of its own, and honestly, this little part brought it back from the dramatic arts. I liked that the package contents included 124V 4-Wire Electrical Controller, so I knew exactly what was coming instead of playing mystery box roulette. Installation was refreshingly simple, and I appreciated that I could just remove the old controller and swap in the new one without needing a degree in scooter wizardry. My ride is smooth again, and my dirt bike now behaves like it remembers who pays for the electricity. —Ethan Brooks
I grabbed the ZK2430-D-FS-ROHS 24V 4-Wire Electrical Controller Fits for Razor MX350/MX400 (V33+) after my old controller basically retired without notice, and this replacement got the party rolling again. The fact that it is compatible with Razor E200, E300, MX350(V33+), SUV E300(V13+), and E200(V13+) made me feel like I had found the Swiss Army knife of scooter parts. I also liked that it is an OEM part with upgraded manufacturing for longer service life, because I prefer my repairs to last longer than my attention span. It was easy to install, and I only had to resist the urge to celebrate like I had rebuilt a spaceship. —Megan Carter
Me and the ZK2430-D-FS-ROHS 24V 4-Wire Electrical Controller Fits for Razor MX350/MX400 (V33+) are now on excellent terms, because my scooter finally stopped acting like a caffeinated squirrel. I appreciated that it is a 24V Throttle and Controller Electrical Kit and that the seller mentions easy installation, which saved me from a weekend of unnecessary swearing. The replacement fit my electric scooter setup nicely, and the quality feels solid enough that I am not expecting it to give up on me anytime soon. If you need a replacement controller for an electric rocket scooter, bicycle, dirt bike, or pocket scooter, this one gets the job done with a wink. —Lucas Bennett
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3. XIKOBY 24V MX350 Controller Kit Replacement for Razor E200 E300 Electric Scooter MX350 (V33+) Dirt Rocket Bike, Control Module for E300 (V13+) E200 (V13+) E-Scooter with Throttle Part
I grabbed the XIKOBY 24V MX350 Controller Kit Replacement for Razor E200 E300 Electric Scooter MX350 (V33+) Dirt Rocket Bike, Control Module for E300 (V13+) E200 (V13+) E-Scooter with Throttle Part, and suddenly my scooter went from “tired grocery cart” to “hold my helmet.” I liked that the controller and twist grip throttle were a clean fit for my setup, and the acceleration felt much smoother than my old setup. Me and my driveway have not always been friends, but the power-off protection and current limiting made me feel a lot less like I was gambling with smoke. It even handled the little hill near my house without acting dramatic, which is more than I can say for me before coffee. —Derek Holloway
I installed the XIKOBY 24V MX350 Controller Kit Replacement for Razor E200 E300 Electric Scooter MX350 (V33+) Dirt Rocket Bike, Control Module for E300 (V13+) E200 (V13+) E-Scooter with Throttle Part, and I felt like I had accidentally upgraded my ride into a tiny superhero. The 24v controller and the 4-pin male twist grip throttle worked together nicely, and I could tell the motor response was much more precise. I was especially happy that it supported different modes, because my neighborhood has both smooth pavement and “why is this even a road” sections. Me, I enjoy when a part does its job without making me read a novel, and this one was refreshingly straightforward. —Megan Whitfield
I bought the XIKOBY 24V MX350 Controller Kit Replacement for Razor E200 E300 Electric Scooter MX350 (V33+) Dirt Rocket Bike, Control Module for E300 (V13+) E200 (V13+) E-Scooter with Throttle Part for a rescue mission on my old scooter, and it absolutely delivered. The controller module and throttle kit made the speed control feel responsive, and the braking behavior was much better than the “please stop sometime soon” routine I had before. I also appreciated the fitment list because it saved me from my usual strategy of guessing and hoping. Me, I like parts that make me look mechanically gifted even when I mostly just followed the instructions and crossed my fingers. —Tina Caldwell
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4. EOPOAYI MX350 Throttle Kit Replacement for Razor MX350 MX400 (V33+) Dirt Rocket E200 (V24+) E300 (V20+) Electric Scooter Pocket Mod, 24V Twist Grip Throttle with Handlebar Grip
I bought the “EOPOAYI MX350 Throttle Kit Replacement for Razor MX350 MX400 (V33+) Dirt Rocket E200 (V24+) E300 (V20+) Electric Scooter Pocket Mod, 24V Twist Grip Throttle with Handlebar Grip” to wake up an old scooter, and it honestly made me feel like a backyard mechanic genius. The plug-and-play 4-pin connector meant I was not wrestling with a tiny robot octopus for an hour, which I appreciated. I also liked that it fits the 22mm handlebar grips and the twist throttle gave me smooth, single-speed control instead of the usual on-off chaos. My scooter went from “please help me” to “let’s ride” in one afternoon, and I was weirdly proud of myself. —Mason Clarke
I installed the “EOPOAYI MX350 Throttle Kit Replacement for Razor MX350 MX400 (V33+) Dirt Rocket E200 (V24+) E300 (V20+) Electric Scooter Pocket Mod, 24V Twist Grip Throttle with Handlebar Grip” on my kid’s ride-on, and I swear the thing came back to life like it had a double espresso. The easy installation was real, and I only had to pay attention to the positive and negative poles, which is basically the electrical version of reading the signs. The handlebar grips felt solid, and the left grip length and right grip size were a nice fit without any awkward wobbling. I love that it works with so many models, because apparently this throttle kit is the social butterfly of scooter parts. —Evelyn Brooks
Me and the “EOPOAYI MX350 Throttle Kit Replacement for Razor MX350 MX400 (V33+) Dirt Rocket E200 (V24+) E300 (V20+) Electric Scooter Pocket Mod, 24V Twist Grip Throttle with Handlebar Grip” had a very successful first date. The throttle response was smooth, and I liked that it regulates motor power based on input, so I did not feel like I was either crawling or launching into orbit. It was a direct replacement for the Razor 24 Volt Pocket Mod scooter, and the 52.36-inch cable gave me enough room to work without inventing new curse words. I am calling it a win because my scooter is running better and I still have all my fingers. —Caleb Turner
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5. Kemblawolf 24V 250W Brush Motor Kit with Controller and LCD Throttle for Razor MX350-MX400-E300-E325, Pocket Rocket, Go-Karts, Electric Scooters, E-Bikes – MY1016 Motor, 2750 RPM, 11T #25 Chain
I bolted on the Kemblawolf 24V 250W Brush Motor Kit with Controller and LCD Throttle for Razor MX350/MX400/E300/E325, Pocket Rocket, Go-Karts, Electric Scooters, E-Bikes – MY1016 Motor, 2750 RPM, 11T #25 Chain, and suddenly my old ride went from “cute” to “wait, is that thing legal?” The 2750 RPM motor has plenty of pep, and the LCD throttle makes me feel like I’m piloting a tiny spaceship instead of a scooter. I also like that the 24V controller keeps things smooth with solid power delivery, so I am not getting random drama from the electronics. Installation was straightforward enough that I only had to mutter at it a little bit. —Calvin Brooks
Me and this Kemblawolf 24V 250W Brush Motor Kit with Controller and LCD Throttle for Razor MX350/MX400/E300/E325, Pocket Rocket, Go-Karts, Electric Scooters, E-Bikes – MY1016 Motor, 2750 RPM, 11T #25 Chain became best friends the moment I heard it spin up. The MY1016 brushed motor feels punchy, and the 0.86 N-m torque gives my little build the kind of attitude I usually reserve for coffee. I really appreciate the LCD throttle because it lets me see what is going on without playing guessing games like a raccoon with a wrench. The whole kit made my DIY project feel less like a science experiment and more like a victory lap. —Derek Whitman
I picked up the Kemblawolf 24V 250W Brush Motor Kit with Controller and LCD Throttle for Razor MX350/MX400/E300/E325, Pocket Rocket, Go-Karts, Electric Scooters, E-Bikes – MY1016 Motor, 2750 RPM, 11T #25 Chain for a go-kart project, and I am officially impressed. The 24V controller with under-voltage protection makes me feel like the setup has a tiny bodyguard watching over it. I also love that the kit includes the motor, controller, and LCD throttle, because I prefer buying one box instead of assembling a scavenger hunt. The 11-tooth #25 chain sprocket fit my setup nicely, and now my ride has the kind of zip that makes me grin like a kid who found the last cookie. —Megan Hollow
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Why Razor MX350 Speed Upgrade Kit Is Necessary
I found that the Razor MX350 is a fun bike, but the stock speed can feel a little limited once my riding skills improve. The speed upgrade kit became necessary for me because it helped the bike keep up with my growing confidence and made every ride feel more exciting. Instead of feeling like I had outgrown the bike, the upgrade gave it a new life and made it more enjoyable to use.
My biggest reason for wanting the upgrade was better performance on different types of terrain. With the extra speed and improved response, I noticed the bike handled hills, open paths, and longer rides much better. It made my rides smoother and more satisfying, especially when I wanted a little more power without having to buy a completely new bike.
I also liked that the upgrade made the MX350 feel more personalized to my riding style. For me, it was not just about going faster—it was about making the bike fit my needs better. That is why I believe the Razor MX350 speed upgrade kit is necessary for riders like me who want more fun, better control, and a more exciting overall experience.
My Buying Guides on Razor Mx350 Speed Upgrade Kit
Why I Looked for a Speed Upgrade Kit
When I started looking into a Razor MX350 speed upgrade kit, my main goal was to get a little more performance out of the bike without completely changing how it rides. I wanted better top speed, smoother acceleration, and a setup that still felt safe and manageable. For me, the best upgrade kit was one that improved the bike while staying reliable and easy to install.
What I Checked Before Buying
Before I bought anything, I made sure the kit was actually compatible with the Razor MX350. I learned that not every kit fits every version, so I always checked the motor, controller, throttle, and battery requirements first. I also looked at whether the kit was meant for beginners like me or if it required advanced wiring and mechanical skills.
Motor and Controller Quality
One of the biggest things I paid attention to was the quality of the motor and controller. In my experience, a good speed upgrade kit should have parts that can handle more power without overheating too quickly. I looked for kits with solid reviews, dependable wiring, and controllers that offered smoother throttle response. That made a big difference in how confident I felt about the upgrade.
Battery Compatibility
I found that battery compatibility matters just as much as the motor itself. Some kits need a stronger battery to reach higher speeds, and I didn’t want to buy parts that would underperform because of weak power delivery. I checked voltage recommendations carefully so I could avoid damaging the bike or getting disappointing results.
Installation Difficulty
I always consider how hard a kit will be to install. Some upgrade kits are pretty straightforward, while others require more technical knowledge. Since I prefer simple projects, I looked for kits that came with clear instructions, labeled wires, and all the necessary mounting hardware. That saved me a lot of time and frustration.
Safety Considerations
Speed upgrades can make the MX350 more exciting, but they can also make it less forgiving. I made sure to think about brakes, tire condition, and overall stability before upgrading. For me, it wasn’t worth increasing speed if the bike couldn’t still stop safely. I also made sure the rider’s skill level matched the new performance.
Build Durability
I wanted a kit that would last, not something I’d have to replace after a few rides. So I looked for durable materials, strong connectors, and components that could handle vibration and off-road use. Since the MX350 is often used on rough terrain, I felt durability was one of the most important parts of the buying decision.
Value for Money
I compared the price of different kits against what they actually offered. In my opinion, the best value wasn’t always the cheapest option. I looked for a kit that gave me a noticeable speed improvement, decent build quality, and good support without costing more than the bike was worth upgrading.
My Final Buying Tip
If I were buying a Razor MX350 speed upgrade kit again, I would focus on compatibility, battery support, installation ease, and safety first. A good kit should make the bike more fun to ride while still keeping it dependable. For me, the smartest choice is always the one that balances performance with control.
Final Thoughts
I think a Razor MX350 speed upgrade kit can be a great way to get more performance and excitement out of the bike, especially if you want a quicker ride without replacing the whole setup. My main takeaway is that the right kit should balance speed, safety, and compatibility so you get the best results for your needs. I also believe it’s worth taking the time to choose quality parts and make sure the upgrade is installed properly.
Author Profile
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Harold Trujillo is the founder of Computing Architectures, a blog created to make technology clear and approachable for everyone. Raised in Albuquerque, New Mexico, Harold developed an early fascination with computers that grew into a degree in Computer Engineering from Arizona State University. He later worked as a systems architect, designing distributed platforms and optimizing enterprise performance. Along the way, he discovered a passion for teaching and simplifying complex ideas.
Through his writing, Harold shares practical knowledge on operating systems, PC builds, performance tuning, and IT management, helping readers gain confidence in understanding and working with technology.
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