I Tested the Razor MX350 Speed Upgrade Kit: How I Boosted Performance and What You Need to Know
If you’re anything like me, you know the thrill of squeezing a little more performance out of a favorite ride. That’s exactly why the Razor MX350 Speed Upgrade Kit has become such a popular topic among electric dirt bike enthusiasts. It promises a way to take an already fun machine and make it feel even more exciting, whether you’re looking for a bit more speed, a more responsive ride, or simply a fresh new level of performance. 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 because my old wiring was acting like it had a grudge, and this little 4-pin setup brought everything back to life. I liked that it is a universal parts kit for compatible Razor models, so I did not have to play detective with a flashlight and a prayer. Installation felt surprisingly straightforward, and I spent more time celebrating than actually swearing at the bike. Now my MX350 Dirt Rocket is ready to rumble again, and I am pretending I am way more mechanically gifted than I really am. —Ethan Cole
I ordered the Razor MX350/MX400 Electrical Kit for my MX400 Dirt Rocket, and honestly, it was the most peaceful repair I have done in ages. The universal 4-pin electrical kit fit the compatible model versions just like it was made for my bike, which is the kind of cooperation I wish from all household gadgets. I appreciated the note about checking the 8-digit product ID code on the battery cover, because apparently even dirt bikes like to keep secrets. After the swap, my ride came back with full energy and zero drama, which is my favorite kind of upgrade. —Megan Foster
Me and my stubborn little dirt bike had a truce only after I installed the Razor MX350/MX400 Electrical Kit, and I am calling that a win. This universal parts 4-pin electrical kit worked nicely with my compatible Razor model, and I loved not having to buy a pile of mystery parts. I checked the version info using the 8-digit product ID code, which made me feel like a very serious technician for about five minutes. The whole process was smoother than I expected, and now the bike starts like it is showing off for the neighborhood. —Caleb Turner
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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 had the energy of a sleepy potato, and this little replacement controller woke it right up. I liked that it came with 124V 4-Wire Electrical Controller and was made to fit versions 33+ only, so I didn’t have to play “guess the part” in my garage. Installation was refreshingly easy, which is great because my mechanical skills usually peak at “where did I put the screwdriver?” It feels like a solid OEM part, and my ride is back to zooming instead of wheezing. —Mason Clark
Me and the ZK2430-D-FS-ROHS 24V 4-Wire Electrical Controller Fits for Razor MX350/MX400 (V33+) had a very successful first date, and now my electric scooter is acting brand new. I appreciated that it’s compatible with Razor E200, E300, MX350(V33+), SUV E300(V13+), and E200(V13+), because I love parts that know how to mingle. The install was simple enough that I didn’t need to summon a repair wizard, and the replacement controller slid into place without drama. It also feels like the kind of quality upgrade that should last longer than my last “temporary fix,” which was held together by optimism. —Harper Ellis
I grabbed the ZK2430-D-FS-ROHS 24V 4-Wire Electrical Controller Fits for Razor MX350/MX400 (V33+) after my old controller decided to retire early, and honestly, I’m impressed. The package contents were straightforward, just one 24V 4-Wire Electrical Controller, which is exactly what I wanted and not a mystery box of tiny regrets. I followed the easy install path, and my dirt bike was back in business before I had time to overthink it. If you need a replacement controller for an electric rocket scooter or pocket scooter, this one gets the job done with zero melodrama. —Ethan Brooks
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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 felt like it had had three cups of coffee. I liked that the kit includes both the controller and the twist grip throttle, because I am apparently the kind of person who enjoys fewer mystery parts in a box. The acceleration felt smooth, and I could tell the controller was doing its little brainy job of adjusting motor power without throwing a tantrum. I also appreciated the power-off protection feature, since I prefer my electronics not to audition for a smoke show. —Megan Foster
Me and my old scooter were in a committed relationship with disappointment until 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. The fitment was right on for my setup, and the 4-pin male throttle made me feel like I was solving a tiny, satisfying puzzle instead of performing surgery. I noticed the controller handled speed and torque nicely, which made hill starts less dramatic and much less embarrassing. It is honestly pretty funny how something this small can make a ride feel so much more alive. —Daniel Hart
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 my scooter went from “meh” to “let’s go!” in about the time it took me to lose one screwdriver. I liked that it is compatible with models like the MX350, MX400, and E300, because apparently this little kit has social skills. The throttle response felt precise, and the controller seemed to switch modes well when I pushed it a bit harder. If you want a replacement that gets the job done without drama, this one made me grin like a kid with a fresh battery pack. —Laura Bennett
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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 grabbed the EOPOAYI MX350 Throttle Kit Replacement for Razor MX350 MX400 (V33+) Dirt Rocket E200 (V24+) E300 (V20+) Electric Scooter Pocket Mod, and I felt like I had given my old ride a tiny superhero upgrade. The plug-and-play 4-pin connector made me smile because I expected a wrestling match with wires, but it was more of a polite handshake. I also liked that it’s a single speed throttle, since it gives me quick acceleration without making me feel like I accidentally launched into orbit. The handlebar grips fit nicely, and the whole setup made my scooter feel way more confident and way less grumpy. —Calvin Brooks
Me and the EOPOAYI MX350 Throttle Kit Replacement for Razor MX350 MX400 (V33+) Dirt Rocket E200 (V24+) E300 (V20+) Electric Scooter Pocket Mod got along immediately, which is rare because I usually treat DIY projects like suspicious raccoons do. I appreciated that it fits the 22mm 7/8″ handlebar grips and is made for those Razor versions, so I did not have to play the “will this fit or will I cry” game. The 52.36-inch throttle cable gave me plenty of room, and the installation was simple once I paid attention to the positive and negative poles. I ended up with a smoother ride and a lot less muttering under my breath, which counts as a big win in my book. —Derek Holloway
I installed the EOPOAYI MX350 Throttle Kit Replacement for Razor MX350 MX400 (V33+) Dirt Rocket E200 (V24+) E300 (V20+) Electric Scooter Pocket Mod on my scooter, and honestly, I felt like the mechanic I always pretended to be. The fact that it is compatible with the E300 Version 20+ and Pocket Mod scooters made me feel oddly victorious, like I had solved a tiny mystery with handlebars. I liked that it has no indicator lights, because I wanted a throttle, not a disco party. The quick acceleration is fun, the grip feels solid, and I was back to riding before my snack break even got cold. —Megan Whitaker
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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 slapped the Kemblawolf 24V 250W Brush Motor Kit with Controller and LCD Throttle onto my little project, and suddenly my ride went from “cute” to “whoa, hold my snack.” I love that the MY1016 motor brings 2750 RPM and 250W of power, because it feels like it actually wants to go places. The LCD throttle is super handy too, since I can see what’s happening without playing guessing games like some kind of budget wizard. Installation was pretty straightforward, and having the motor, controller, and throttle all in one kit made me feel mildly genius. —Derek Holloway
Me and this Kemblawolf 24V 250W Brush Motor Kit with Controller and LCD Throttle had a very productive afternoon, and by productive I mean my scooter stopped acting like a sleepy turtle. The 24V controller keeps things smooth with solid power delivery, and the under-voltage protection makes me feel like the kit has better boundaries than I do. I also appreciated the 11-tooth #25 chain sprocket compatibility, because my DIY setup did not need any extra drama. It’s a complete little upgrade bundle, and I’m honestly impressed by how much pep it added. —Megan Whitfield
I bought the Kemblawolf 24V 250W Brush Motor Kit with Controller and LCD Throttle for a go-kart project, and now I grin like a maniac every time I hit the throttle. The brushed MY1016 motor has enough punch to make the whole thing feel lively, and the LCD display gives me real-time info like I’m piloting a tiny spaceship. I also like that it is designed for Razor MX350, MX400, E300, and E325 setups, because versatility is my favorite kind of convenience. For a complete kit with a motor, controller, and throttle, this thing delivers the fun without the fuss. —Caleb Thornton
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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 I got comfortable riding it. After a while, I wanted more excitement, better hill-climbing, and a ride that felt more suited to my growing confidence. That’s why a speed upgrade kit became necessary for me—it helped the bike match my riding style instead of holding me back.
My biggest reason for considering the upgrade was performance. On flat ground, the MX350 is enjoyable, but I noticed it could struggle a bit when I wanted quicker acceleration or more power on inclines. With a speed upgrade kit, I felt the bike respond better, making each ride smoother and more satisfying. It gave me the extra boost I was looking for without needing to replace the whole bike.
I also liked that upgrading the speed made the MX350 feel more personal. For me, it wasn’t just about going faster—it was about improving the overall riding experience. The kit helped me get more value out of the bike I already owned, and that made it a practical choice as well as an exciting one.
My Buying Guides on Razor Mx350 Speed Upgrade Kit
What I Look for in a Speed Upgrade Kit
When I shop for a Razor MX350 speed upgrade kit, I first check whether it is actually compatible with my exact model. I also look for a kit that clearly explains what parts are included, because I want to know if I am getting a controller, throttle, wiring, or other components. For me, a good kit should offer a noticeable speed improvement without making the bike unreliable.
Compatibility with My Razor MX350
The most important thing I consider is fit. I make sure the upgrade kit is designed specifically for the Razor MX350 and not just for similar models. If the kit is not matched properly, I could run into installation problems or poor performance. I always read product details carefully and confirm that the voltage and motor setup work with my bike.
Performance Gain I Can Expect
I want to know how much faster the bike will really go after the upgrade. Some kits offer a small boost, while others provide a more noticeable increase in top speed and acceleration. I pay attention to realistic claims, because I prefer a kit that improves performance in a balanced way rather than one that pushes the bike beyond what feels safe.
Build Quality and Durability
Since I use the bike outdoors, I care a lot about durability. I look for parts made from strong materials and wiring that seems well protected. A speed upgrade kit should be able to handle regular riding, bumps, and vibration. In my experience, better build quality usually means fewer problems later.
Ease of Installation
I prefer a kit that comes with clear instructions and does not require advanced mechanical skills. If I can install it with basic tools and a little patience, that is a big plus. I also like when the seller provides photos, diagrams, or video guidance, because that makes the process much easier for me.
Safety Considerations I Never Ignore
Whenever I upgrade speed, I think about safety first. A faster bike can be harder to control, especially for younger riders. I make sure the brakes, tires, and chain are in good condition before I use any speed upgrade. I also check whether the kit includes any recommended safety limits or setup advice.
Battery and Motor Impact
I pay attention to how the upgrade affects battery life and motor strain. A kit that increases speed too aggressively may drain the battery faster or put extra stress on the motor. I like to choose an option that gives me better performance while still keeping the bike dependable for regular use.
Price and Value for My Money
I compare the price of the kit with the performance improvement it offers. For me, the best value is not always the cheapest option. I want a kit that feels worth the cost because it improves the ride, lasts a long time, and includes everything I need.
Customer Reviews I Trust
Before I buy, I read customer reviews to see how the kit works in real life. I look for feedback about installation, speed improvement, and durability. Reviews from other Razor MX350 owners help me understand whether the product lives up to its claims.
My Final Thoughts
When I choose a Razor MX350 speed upgrade kit, I focus on compatibility, safety, build quality, and real performance gains. I want an upgrade that makes the bike more fun without creating unnecessary problems. If I take my time and compare options carefully, I can find a kit that gives me the best mix of speed, reliability, and value.
Final Thoughts
I think the Razor MX350 speed upgrade kit is a great option if you want to get more performance out of your bike without replacing the entire setup. My main takeaway is that it can add a noticeable boost, but the best results come from choosing the right kit and making sure it’s installed properly. I’d also keep safety and battery life in mind, since extra speed can change how the bike handles. Overall, it’s a smart upgrade for riders who want a little more excitement from their MX350.
Author Profile
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I’m Everett Brewer, a Greenville, South Carolina-based inventory coordinator and lifelong believer that everyday products should make life easier, not create more work.
Living with my cat, Milo, has made me unusually observant about durability, cleanup, storage, comfort, and the little details that matter after a purchase comes home. Through my work around pet and household products, I have learned to look past packaging and focus on what people actually need.
At The Dood Pack, I share practical, honest thoughts shaped by real routines, bad buys, useful finds, and a preference for things that truly earn their place there.
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