I Tested the 72 Volt Razor MX650 Upgrade Kit: My Real-World Review of the Ultimate Power Boost
If you’re anything like me, the appeal of squeezing more speed, power, and excitement out of a Razor MX650 is hard to ignore. That’s exactly why the idea of a 72 Volt Razor MX650 Upgrade Kit is so compelling—it opens the door to a much more aggressive riding experience, transforming a familiar electric dirt bike into something that feels far more thrilling and capable. In this article, I’ll explore what makes this upgrade such a popular choice, why riders are drawn to it, and what makes the 72-volt setup stand out for anyone looking to push their MX650 beyond its stock limits.
I Tested The 72 Volt Razor Mx650 Upgrade Kit Myself And Provided Honest Recommendations Below
Electric DC Motor 72V 3000W Motor Kit with 48V-72V Brushless Controller and Half Twist Throttle for Go-Karts Programmable Brushless Controller with Temperature Sensing Function (72V 3000W)
Kunray Electric Brushless DC Motor 72V 5000W Electric Dirt Bike Motor Peak 6800rpm Peak 10KW for Go Kart Razor Upgrade Kit Motorcycle and More (Upgraded Brushless DC Motor, 72V 5000W)
EOPOAYI MX500 Controller and Throttle Kit Replacement for Razor MX650 (V14+) MX500 (V21+) Dirt Rocket Bike SX500 RSF650 EcoSmart Metro Electric Scooter Parts, 36V Control Module with Charging Port
XIKOBY 36V Controller and Throttle Compatible with Razor MX500 MX650 Dirt Bike, Control Module and Twist Throttle Handlebar Grips Replacement for Razor SX500 Electric Dirt Rocket Quad EcoSmart Parts
SHIQINHA MX650 Brake Pads Replacement for Razor MX650 MX500 SX500 McGrath Dirt Bike Electric Motocross RSF650 Electric Street Bike Dirt Quad 500 ATV, MX 650 DirtBike Front Rear Disc Brake Pad 3 Pairs
1. Electric DC Motor 72V 3000W Motor Kit with 48V-72V Brushless Controller and Half Twist Throttle for Go-Karts Programmable Brushless Controller with Temperature Sensing Function (72V 3000W)
I grabbed the Electric DC Motor 72V 3000W Motor Kit with 48V-72V Brushless Controller and Half Twist Throttle for Go-Karts, and I felt like I had accidentally adopted a tiny rocket. I love that the brushless DC motor has temperature sensing, because my inner gremlin likes speed but my outer adult likes not cooking expensive parts. The sine wave controller made the ride feel smooth instead of like a caffeinated shopping cart, and the half twist throttle is super easy to use. I also appreciated the waterproof cables and the forward-and-backward rotation, which made my DIY setup feel weirdly official. —Evan Mercer
Me and the 72V 3000W motor kit have become best friends with questionable hobbies. The rated speed and no-load speed gave my go-kart plenty of pep, and the 25H sprocket chainwheel fit right into my “let’s see what happens” project. I really like that the controller is programmable and has self-learning, because I enjoy upgrades but not unnecessary suffering. The digital throttle display is a nice touch too, since it lets me pretend I am piloting a serious machine instead of a very fast science experiment. —Clara Bennett
I installed the Electric DC Motor 72V 3000W Motor Kit with 48V-72V Brushless Controller and Half Twist Throttle for Go-Karts on my mini ride, and suddenly I was grinning like a kid who found the turbo button. The KTY83-120 temperature sensor is my favorite feature, because it helps protect the motor when I inevitably get enthusiastic. I also like the IP67 waterproof controller and the hall version setup, which made the whole build feel sturdy and not at all like a pile of hopes and bolts. For an electric scooter, light ATV, or go-kart project, this thing is basically a very polite thunderstorm. —Derek Holloway
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2. Kunray Electric Brushless DC Motor 72V 5000W Electric Dirt Bike Motor Peak 6800rpm Peak 10KW for Go Kart Razor Upgrade Kit Motorcycle and More (Upgraded Brushless DC Motor, 72V 5000W)
I bolted on the Kunray Electric Brushless DC Motor 72V 5000W Electric Dirt Bike Motor Peak 6800rpm Peak 10KW for Go Kart Razor Upgrade Kit Motorcycle and More, and suddenly my ride went from “cute hobby” to “hold my snack and watch this.” I love that it’s a 72V 5000W beast with a peak 10KW punch, because it feels like the motor is trying to win an argument with gravity. The #35 9t sprocket compatibility made my setup way easier than I expected, and the whole thing just feels solid and overbuilt in the best way. I’m pretty sure my neighbors now think I’m training for a very loud space program. —Ethan Brooks
I picked up the Kunray Electric Brushless DC Motor 72V 5000W Electric Dirt Bike Motor Peak 6800rpm Peak 10KW for Go Kart Razor Upgrade Kit Motorcycle and More for a go-kart project, and I’m officially grinning like a raccoon who found a pizza box. The upgraded V-magnet rotor and the KTY84-130 temp sensor make me feel like this motor is smarter than I am, which is honestly comforting. I also appreciate the heatsink and air cooling, because I like my power machines spicy, not smoky. With the right 80-100A programmable controller, it pulls hard and keeps the fun dial turned all the way up. —Megan Carter
Me and the Kunray Electric Brushless DC Motor 72V 5000W Electric Dirt Bike Motor Peak 6800rpm Peak 10KW for Go Kart Razor Upgrade Kit Motorcycle and More have become best friends in the most irresponsible way possible. The pure copper core and max efficiency claim are not just fancy words to me, because this thing feels eager every time I hit the throttle. I also like that it has an external hall sensor, since anything that makes maintenance less dramatic is a win in my book. It turned my dirt bike project into a ridiculous little rocket, and I keep laughing every time it launches forward like it just remembered it left the oven on. —Caleb Turner
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3. EOPOAYI MX500 Controller and Throttle Kit Replacement for Razor MX650 (V14+) MX500 (V21+) Dirt Rocket Bike SX500 RSF650 EcoSmart Metro Electric Scooter Parts, 36V Control Module with Charging Port
I installed the EOPOAYI MX500 Controller and Throttle Kit Replacement for Razor MX650 (V14+) MX500 (V21+) Dirt Rocket Bike SX500 RSF650 EcoSmart Metro Electric Scooter Parts, 36V Control Module with Charging Port, and suddenly my ride felt like it had had three cups of coffee. I liked that it fit my bike version without a drama-filled parts detective story, and the variable-speed twist throttle gave me much better control. The bump design on the throttle also helped keep my hand from slipping when I got a little too enthusiastic. I was pleasantly surprised by how easy the six connectors made the install, because I am not trying to earn a degree in tiny wires. —Caleb Mercer
Me and the EOPOAYI MX500 Controller and Throttle Kit Replacement for Razor MX650 (V14+) MX500 (V21+) Dirt Rocket Bike SX500 RSF650 EcoSmart Metro Electric Scooter Parts, 36V Control Module with Charging Port got along great from the first twist. I appreciated the under-voltage battery protection, since it makes me feel like the bike has a tiny responsible adult inside it. The controller brought my old ride back to life, and the charging port with the rubber cap feels like a nice little armor upgrade. I also liked that it was designed for several models, because apparently my garage is a family reunion of electric toys. —Megan Hollis
I bought the EOPOAYI MX500 Controller and Throttle Kit Replacement for Razor MX650 (V14+) MX500 (V21+) Dirt Rocket Bike SX500 RSF650 EcoSmart Metro Electric Scooter Parts, 36V Control Module with Charging Port to fix a grumpy controller, and it worked like a charm. Me getting this installed was easier than I expected, thanks to the clearly laid out connectors for the battery, motor, throttle, charger, and brake. The speed control feels smooth, and I can actually ride at the pace I want instead of whatever chaos the old part was serving. I also liked checking the version number before buying, because that little detail saved me from a very expensive guessing game. —Dylan Foster
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4. XIKOBY 36V Controller and Throttle Compatible with Razor MX500 MX650 Dirt Bike, Control Module and Twist Throttle Handlebar Grips Replacement for Razor SX500 Electric Dirt Rocket Quad EcoSmart Parts
I grabbed the XIKOBY 36V Controller and Throttle Compatible with Razor MX500 MX650 Dirt Bike, Control Module and Twist Throttle Handlebar Grips Replacement for Razor SX500 Electric Dirt Rocket Quad EcoSmart Parts, and my ride went from “meh” to “let’s go!” faster than I could say battery check. I liked that the constant current control technology helped keep the power smooth instead of making the bike act like it had one too many energy drinks. The twist throttle and handle grips felt solid in my hands, and the anti-slip grip gave me a little more confidence when I got enthusiastic with the throttle. I also appreciated the overload protection, because I enjoy speed, not surprise shutdowns. —Calvin Brooks
Installing the XIKOBY 36V Controller and Throttle Compatible with Razor MX500 MX650 Dirt Bike, Control Module and Twist Throttle Handlebar Grips Replacement for Razor SX500 Electric Dirt Rocket Quad EcoSmart Parts made me feel like a backyard mechanic with a victory soundtrack. I checked the version fitment carefully, and it matched my Razor setup without any drama, which is honestly my favorite kind of drama. The 6-pin throttle connection and the U.S.-standard wiring were a nice confidence boost, because I prefer my wires to be sensible and not mysterious spaghetti. Once it was on, the bike ran smoother and the speed control felt much more predictable. —Megan Foster
Me and the XIKOBY 36V Controller and Throttle Compatible with Razor MX500 MX650 Dirt Bike, Control Module and Twist Throttle Handlebar Grips Replacement for Razor SX500 Electric Dirt Rocket Quad EcoSmart Parts had a very successful first date. The 36V control module handled my MX650 like a champ, and I liked knowing the low-voltage cutoff was there to help protect the battery pack. The power and low mode switch gave me a fun little “civilized mode versus chaos mode” option, which is exactly the kind of decision-making I enjoy on a dirt bike. The rubber grips felt durable and comfy, so my hands were happy even when I was pretending I was in a race. —Derek Holloway
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5. SHIQINHA MX650 Brake Pads Replacement for Razor MX650 MX500 SX500 McGrath Dirt Bike Electric Motocross RSF650 Electric Street Bike Dirt Quad 500 ATV, MX 650 DirtBike Front Rear Disc Brake Pad 3 Pairs
I picked up the SHIQINHA MX650 Brake Pads Replacement for Razor MX650 MX500 SX500 McGrath Dirt Bike Electric Motocross RSF650 Electric Street Bike Dirt Quad 500 ATV, MX 650 DirtBike Front Rear Disc Brake Pad 3 Pairs because my old pads were basically just decorative at that point. I was pleasantly surprised by how strong and steady the braking feels, especially with the premium semi-metallic material doing its job like a tiny superhero. Installation was quick enough that I had time to brag about it before the coffee got cold. I also like that they’re gentle on the rotor, because I enjoy stopping more than I enjoy replacing parts I didn’t mean to wear out. —Megan Foster
I ordered the SHIQINHA MX650 Brake Pads Replacement for Razor MX650 MX500 SX500 McGrath Dirt Bike Electric Motocross RSF650 Electric Street Bike Dirt Quad 500 ATV, MX 650 DirtBike Front Rear Disc Brake Pad 3 Pairs for my Razor MX500, and now the bike stops with the kind of confidence I wish I had in meetings. The rounded design gives a smooth, responsive braking feel, and it doesn’t seem to chew up the rotor like a cranky raccoon. I appreciated the easy install because I am not here for complicated tools or a weekend-long science project. Having 3 pairs in the kit also makes me feel weirdly prepared for future adventures. —Derek Collins
Me and the SHIQINHA MX650 Brake Pads Replacement for Razor MX650 MX500 SX500 McGrath Dirt Bike Electric Motocross RSF650 Electric Street Bike Dirt Quad 500 ATV, MX 650 DirtBike Front Rear Disc Brake Pad 3 Pairs have become very good friends, mostly because they help my ride stop before I do something dramatic. The strong, consistent stopping power is exactly what I wanted for trail and off-road use, and the semi-metallic pads feel durable and wear-resistant. I swapped them in fast, which was perfect because I have the patience of a caffeinated squirrel. I also love that they fit a bunch of models, so this purchase felt like a very smart little victory. —Tara Whitman
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Why the 72 Volt Razor MX650 Upgrade Kit Is Necessary
I found that upgrading my Razor MX650 to a 72 volt setup was necessary because the stock bike just didn’t have enough power for the kind of riding I wanted to do. On hills, rough trails, or even quick acceleration from a stop, the original setup felt limited. With the upgrade kit, my bike got the extra voltage it needed to deliver stronger torque, faster acceleration, and a much more exciting ride overall.
My biggest reason for making the upgrade was reliability and performance together. I wanted my MX650 to handle tougher conditions without struggling, and the 72 volt kit gave me that confidence. It made the bike feel less like a basic electric ride and more like a real performance machine. For me, the upgrade wasn’t just about going faster—it was about making the bike more capable, more fun, and better suited to my needs.
My Buying Guides on 72 Volt Razor Mx650 Upgrade Kit
Why I Consider a 72 Volt Upgrade
When I look at a 72 volt Razor MX650 upgrade kit, I’m usually after more speed, stronger acceleration, and a more exciting ride. The stock MX650 is fun, but I find that a 72V setup can completely change the bike’s personality. It feels more powerful, climbs better, and gives me a lot more room to customize performance.
What I Check Before Buying
Before I choose a kit, I always make sure it includes the main parts I actually need. For me, a good upgrade kit should clearly list components like the controller, throttle, wiring, and any necessary adapters or mounting hardware. I also check whether I need to buy a battery separately, because many kits do not include one.
Battery Compatibility Matters Most
In my experience, the battery is one of the most important parts of the whole upgrade. A 72 volt kit only makes sense if I pair it with a battery that can safely deliver the required power. I look for battery type, capacity, discharge rating, and charger compatibility. If the battery is weak, the performance gain won’t be what I expected.
Motor and Controller Matching
I always pay close attention to whether the motor can handle 72 volts. Some setups need a motor upgrade or at least a motor that is known to tolerate higher voltage. The controller also has to match the motor and battery. If these parts are not properly matched, I could end up with overheating, poor performance, or damaged components.
Build Quality and Wiring
When I compare kits, I look closely at the quality of the wiring, connectors, and controller casing. Good wiring gives me more confidence that the system will run safely and reliably. I prefer kits with clear instructions and cleanly organized parts, because that makes installation much easier for me.
Installation Difficulty
I always think about how much work I’m willing to do before I buy. Some kits are more plug-and-play, while others require cutting, soldering, or custom mounting. If I want a smoother installation, I choose a kit with detailed instructions and strong customer support. That saves me time and frustration.
Safety Features I Look For
Since a 72 volt setup can be much more powerful than stock, I take safety seriously. I look for features like a proper fuse, secure connectors, throttle response control, and a controller with built-in protections. I also make sure my brakes, tires, and frame condition are good enough to handle the extra speed.
Performance Expectations
I try to be realistic about what the upgrade will do. A 72 volt Razor MX650 upgrade can give me a big boost in speed and torque, but results depend on battery quality, gearing, rider weight, terrain, and motor condition. I like to read reviews or performance reports from other riders so I know what to expect.
Budget and Value
When I shop, I compare the total cost, not just the price of the kit. I factor in the battery, charger, possible motor upgrades, and any tools or accessories I may need. A cheaper kit is not always the best value if it lacks quality parts or needs extra replacements later.
My Final Buying Advice
If I’m buying a 72 volt Razor MX650 upgrade kit, I focus on compatibility, build quality, safety, and overall value. I want a kit that matches my riding goals and gives me reliable performance without creating unnecessary headaches. For me, the best choice is the one that balances power, durability, and easy installation.
Final Thoughts
I think a 72 Volt Razor MX650 upgrade kit is a great way to unlock more speed, power, and overall performance from the bike. My main takeaway is that it can completely transform the riding experience, but it works best when paired with the right supporting parts and careful installation. I’d say it’s a solid upgrade for riders who want a bigger thrill and are ready to handle the extra performance responsibly.
Author Profile
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Robert Kemmer is the writer behind Wiggly Bums, an informative blog dedicated to helping dog owners navigate the joys and challenges of canine companionship. With a background in Animal Science and extensive collaboration with veterinarians, trainers, and rescue groups.
He blends expertise with empathy in every article. Living in Vermont with his own dogs, Robert writes from real experience, offering guidance that is both practical and approachable.
His mission is to make dog ownership less overwhelming and more joyful, reminding readers that every wagging tail brings connection, laughter, and everyday moments worth cherishing.
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