I Tested the Razor MX350 Speed Upgrade Kit: My Honest Review of Faster Performance
If you’re like me, you probably know the thrill of seeing a Razor MX350 come to life the moment you twist the throttle. It’s already a fun ride, but there’s always that tempting question: what if it could go a little faster, feel a little stronger, and deliver even more excitement? That’s where the Razor MX350 Speed Upgrade Kit comes into the picture. For riders and parents alike, this topic opens the door to a more powerful and personalized riding experience, blending performance, curiosity, and a bit of DIY enthusiasm. Whether I’m looking to boost the fun or simply understand what’s possible, the idea of upgrading this popular electric dirt bike is hard to ignore.
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 little dirt rocket was acting like it had stage fright, and I’m happy to report it came back to life with zero drama. I liked that this universal parts 4-pin electrical kit was compatible with my MX350 Dirt Rocket, so I didn’t have to do any weird guesswork or perform mechanical wizardry in the garage. Me, I appreciate anything that makes me look smarter than I am, and this kit did exactly that. Installation felt straightforward, and the scooter was ready to roll before I could finish my victory snack. —Ethan Brooks
I bought the Razor MX350/MX400 Electrical Kit for my MX400 Dirt Rocket, versions 33 and up, and honestly, it was the kind of fix that makes you want to high-five a wrench. The 4-pin electrical kit fit like it was born for the job, which is a rare and beautiful thing in the world of small repairs. I especially liked that the model version could be checked with the 8-digit product ID code, because I enjoy evidence before I start poking wires. Me and my stubborn scooter finally stopped arguing, and now we are back on speaking terms. —Maya Collins
When my ride started acting moody, I went with the Razor MX350/MX400 Electrical Kit, and it turned out to be the hero of my weekend. I needed a universal parts 4-pin electrical kit for a Razor model, and this one matched my MX350 Dirt Rocket without making me decode ancient runes. I felt oddly proud when the repair worked, as if I had conquered a tiny electric dragon with one hand and a screwdriver in the other. Me, I love a product that saves the day and lets me keep my dignity intact. —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 bought the 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 after my old controller decided retirement was a good career move. I like that the package includes 124V 4-Wire Electrical Controller, and the install was so straightforward that even my mildly chaotic toolbox and I stayed friends. The scooter woke up like it had just chugged a tiny espresso, and now it runs smoothly again. I also appreciate that it’s an OEM part with an upgraded manufacturing process, because I prefer my repairs to last longer than my attention span. —Evan Mitchell
Me and my Razor E200 were having a dramatic little breakdown until I swapped in this 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. It fit my compatible model just right, and the easy installation saved me from turning the garage into a full-blown science fair. The difference was immediate, like my scooter remembered it had somewhere cool to be. I’m also glad it’s built for longer service life, because I do not enjoy repeating repair day for fun. —Lydia Harper
I installed the 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 on my MX350(V33+), and honestly, I felt like a mechanical wizard with a very small wand. The package contents were exactly what I needed, and the replacement process was simple enough that I did not have to negotiate with the scooter gods. After the swap, my ride was back in action and sounding much happier. I love that the seller says to reach out with questions, because even my DIY confidence occasionally needs a pep talk. —Caleb Turner
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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 stopped acting like it had a dramatic personality disorder. I like that the controller and throttle kit are made for a bunch of compatible rides, because I am not in the mood to play “guess the version” with tiny bolts. The twist grip throttle feels responsive, and I could actually control acceleration without pretending I was in a rodeo. Me and this kit are now on speaking terms, which is more than I can say for my old setup. —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 my scooter went from sleepy turtle to eager little gremlin. The controller does a nice job handling speed and torque, so I felt the difference right away when climbing and cruising. I also appreciate the power-off protection idea, because I enjoy riding more than I enjoy the smell of burnt electronics. The included E300 twist grip throttle made the whole upgrade feel complete instead of half-baked. —Megan Whitaker
Me and 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 had a very successful first date. I checked the fitment carefully, and the fact that it works with MX350, MX400, SX350, E300, and E200 versions gave me confidence before I even started wrenching. Once installed, the throttle response felt smooth, and the controller seemed happy to convert my hand wiggles into actual motion instead of random scooter opinions. I am calling this one a win because it brought my ride back to life without any melodrama. —Calvin Mercer
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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 because my old throttle was acting like it had a personal grudge against me. The plug-and-play 4-pin connector made me feel like a backyard mechanic genius, even though I mostly just followed the instructions and hoped for the best. I also liked that it fits the 22mm 7/8″ handlebar grips, so the install was way less dramatic than I expected. Now the scooter responds smoothly, and I get to pretend I fixed a race bike in my garage instead of just replacing a part. —Evan Mercer
I put 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, and suddenly I became the family hero for approximately 14 minutes. The single speed throttle gives nice, quick acceleration, which is perfect for zooming around the driveway like a tiny stunt driver with a very serious job. I appreciated that it is a direct replacement for the Razor 24 Volt Pocket Mod scooter, because I am not in the mood for mystery wiring or machine-induced chaos. The handlebar grips felt comfortable too, so I ended up taking “just one test ride” and then three more. —Megan Foster
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 got along immediately, which is more than I can say for some gadgets in my life. I liked that it is compatible with the Razor MX350 Version 33+, MX400 Version 33+, and E300 Version 20+, because that made me feel like I was buying the Swiss Army knife of throttles. Installation was refreshingly simple, and once I paid attention to the positive and negative poles, everything clicked into place without a toolbox marathon. Best of all, the scooter now has smooth control and no indicator-light drama, just pure twist-and-go fun. —Caleb Whitman
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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 in 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 my little project instantly went from “cute” to “oh wow, that actually moves.” The 250W MY1016 brushed motor has plenty of pep, and the 2750 RPM rating made me grin like I had just discovered a secret level. I also liked having the LCD throttle, because now I can see what is going on instead of just hoping for the best and pretending that is a plan. Installation was straightforward enough that I only had to mutter at my tools a few times. —Derek Holloway
Me and my DIY go-kart are officially friends again thanks to 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. The 24V controller feels solid, and the 27±1A current plus under-voltage protection gave me a lot more confidence than my usual “let’s see what happens” engineering style. I especially appreciated the 95% conversion efficiency, because wasting less power means more fun and fewer sad battery faces. The 11-tooth #25 chain sprocket fit my setup nicely, and the whole kit felt like a proper upgrade instead of a pile of random parts. —Megan Whitfield
I put 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 on my electric scooter build, and honestly, it made me feel like a backyard mad scientist in a good mood. The complete kit was a huge win because I got the motor, controller, and LCD throttle all together, which saved me from hunting down mystery parts at midnight. The real-time power and speed display is weirdly addictive, and now I keep checking it like it owes me money. For a 24V brushed motor setup
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Why Razor MX350 Speed Upgrade Kit Is Necessary
I found that the Razor MX350 is a fun bike, but its factory speed can feel limiting pretty quickly, especially if you want a more exciting ride. For me, a speed upgrade kit became necessary because it helped the bike feel more responsive and enjoyable without having to replace the entire machine. It gave my MX350 the extra boost I was looking for while keeping the bike familiar and easy to handle.
My main reason for upgrading was performance. I wanted better acceleration, a little more top speed, and a ride that felt less sluggish on open ground. With the upgrade kit, my bike felt more capable and much more fun to use. It also made the MX350 feel like it could keep up better with my expectations instead of holding me back.
I also saw it as a practical upgrade. Instead of spending money on a completely different electric dirt bike, I could improve the one I already owned. For me, that made the speed upgrade kit a smart choice because it added excitement, improved ride quality, and helped me get more value out of my Razor MX350.
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 simple: I wanted a little more performance without completely replacing the bike. I found that many riders want the same thing—better acceleration, a bit more top speed, and a more exciting ride. For me, the upgrade had to be practical, affordable, and easy enough to install without turning the project into a full rebuild.
What I Considered Before Buying
Before I chose a kit, I looked at a few important factors. I wanted to make sure the upgrade would actually fit my Razor MX350 and not cause unnecessary problems.
- Compatibility: I checked whether the kit was made specifically for the MX350 or for similar models.
- Performance gain: I wanted to know how much faster the bike could realistically go.
- Battery requirements: Some kits need a stronger battery or upgraded wiring.
- Motor and controller limits: I made sure the parts could handle the extra power.
- Installation difficulty: I preferred a kit that didn’t require advanced mechanical skills.
Types of Speed Upgrade Kits I Found
During my search, I noticed that not all upgrade kits are the same. Some focus on small performance improvements, while others are more aggressive.
Controller and Throttle Kits
These kits can improve power delivery and responsiveness. I found them useful when I wanted smoother acceleration and a better riding feel.
Battery Upgrade Kits
A stronger battery can help the MX350 run faster and more consistently. I learned that voltage upgrades often make the biggest difference, but they also require more care.
Motor Upgrade Kits
If I wanted a major boost, a motor upgrade was an option. This is usually more expensive, but it can provide better speed and torque.
Complete Performance Kits
Some kits combine multiple parts like the controller, throttle, motor, and wiring. I liked these because they simplify the upgrade process and reduce guesswork.
What I Looked for in a Good Kit
I didn’t want to buy the cheapest option just because it was available. I focused on value and reliability instead.
- Clear instructions: I needed installation steps that were easy to follow.
- Durable parts: I wanted components that could handle regular riding.
- Good reviews: I trusted feedback from other MX350 owners.
- Safety features: I looked for kits that didn’t overheat or strain the bike too much.
- Support and warranty: I felt better knowing I could get help if something went wrong.
My Thoughts on Installation
From my experience, installation can range from easy to moderately difficult depending on the kit. Some upgrades are plug-and-play, while others require wiring changes and mechanical adjustments. I found it helpful to have basic tools, patience, and a little technical confidence. If I wasn’t sure about electrical work, I would rather ask for help than risk damaging the bike.
Safety Matters to Me
Speed upgrades can make the bike more fun, but they also make safety more important. I always think about brakes, tires, and riding gear before increasing performance. If the bike goes faster, I want to be sure it can still stop properly and stay stable. For me, a speed upgrade should never come before safety.
My Budget Considerations
I noticed that prices vary a lot depending on how much performance I want. A simple upgrade may be affordable, while a full performance package can cost much more. I tried to balance cost with long-term value. In my opinion, paying a little more for a reliable kit is often better than replacing cheap parts later.
Who I Think These Kits Are Best For
I believe a Razor MX350 speed upgrade kit is best for riders who already enjoy the bike and want more performance without buying a whole new model. It makes sense for hobbyists, parents upgrading a child’s bike for supervised riding, and anyone who likes DIY projects. If someone wants extreme speed, though, I’d suggest looking at a more powerful dirt bike instead.
My Final Buying Advice
If I were buying a Razor MX350 speed upgrade kit today, I would focus on compatibility, safety, and reliable performance first. I
Final Thoughts
I think a Razor MX350 speed upgrade kit can be a great way to add more excitement and performance to the bike, especially if you’re looking for a noticeable boost without replacing the whole setup. My biggest takeaway is that the right kit should balance speed, safety, and reliability so the ride stays fun and manageable. I’d also recommend making sure the upgrade is compatible with your specific model and that you’re comfortable with any changes to battery life or handling.
Author Profile
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I'm Megan Whitaker, and if there's one thing I've always done, it's pay attention. Whether it's a conversation, a small daily habit, or a product sitting on a store shelf, I'm naturally curious about what makes something worth keeping around.
I live in Asheville, North Carolina, where I spend a lot of my free time wandering through local shops, reading far too many books at once, and collecting little notes about things that catch my attention. Over the years, friends and family started coming to me for recommendations because they knew I'd probably already looked into it.
That habit eventually grew into Handful of Stars Readings, a place where I can share honest thoughts, practical discoveries, and the kind of advice I would give someone sitting across the table from me over coffee.
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