What a Razor MX350 upgrade kit is and what it changes
A Razor MX350 upgrade kit is a collection of replacement parts designed to improve the performance or durability of your Razor MX350 electric scooter. These kits typically include components like a stronger motor, upgraded battery, better brakes, improved tires, or a reinforced frame — though not all kits include every part. The specific upgrades depend on which kit you buy and from which manufacturer.
The MX350 is Razor's entry-level electric scooter for riders aged 13 and up, with a top speed around 10 mph and a range of about 40 minutes on a single charge. Upgrade kits exist because riders often want their scooters to go faster, travel farther, stop more reliably, or last longer before parts wear out. Understanding what each upgrade actually does — and what it costs — helps you decide whether the change is worth making.
Key Takeaways
- Upgrade kits for the MX350 come from third-party manufacturers, not Razor itself, and typically focus on the motor, battery, brakes, or tires.
- Motor upgrades increase top speed and acceleration, but may void your warranty and require you to check local laws about scooter speed limits.
- Battery upgrades extend how long you can ride before recharging, though they add weight and may not fit the original scooter frame without modification.
- Brake and tire upgrades improve stopping power and grip, which matter more for safety than raw speed.
- Before buying any kit, confirm it physically fits your MX350 model year and check whether the upgrade requires tools or technical skill you have.
Motor upgrade kits and what faster speed actually means
Motor upgrade kits replace the original 250-watt motor with a stronger one, usually between 500 and 1000 watts. This increases your top speed from around 10 mph to anywhere from 15 to 25 mph, depending on the kit. It also makes the scooter accelerate faster and climb hills more easily.
Before you buy a motor upgrade, check your local laws. Many cities and states have speed limits for electric scooters — often 15 mph on sidewalks and 20 mph on streets. A faster scooter may be illegal to ride in your area, even if it is technically possible to install. You should also know that upgrading the motor often voids Razor's warranty, meaning if something breaks, you cannot send it back for a free replacement or repair.
A stronger motor also drains the battery faster, so you may need a battery upgrade at the same time to keep your range reasonable. The motor itself usually costs between $80 and $200, depending on the wattage and brand.
Battery upgrades and how range works
The standard MX350 battery holds enough charge for about 40 minutes of riding, which translates to roughly 8 to 10 miles depending on your weight and terrain. Upgraded batteries typically double or triple that range, letting you ride for 1.5 to 2 hours before needing to recharge.
Battery upgrades come in two types: higher-capacity versions of the original battery design, or entirely different battery packs that require rewiring. Higher-capacity batteries are simpler to install — you swap them in place of the original — but they are heavier and may not fit neatly in the scooter's battery compartment. Different battery packs offer more flexibility but require you to disconnect and reconnect wiring, which is riskier if you are not comfortable with electrical work.
Upgraded batteries typically cost $150 to $400. Keep in mind that a heavier battery makes the scooter harder to carry and slightly slower to accelerate, even if it lets you ride longer. If you mostly ride short distances, a battery upgrade may not be necessary.
Brake and tire upgrades for safety and control
The MX350 comes with a basic friction brake on the rear wheel and an electronic brake on the motor. Brake upgrade kits replace these with hydraulic disc brakes or regenerative braking systems that stop the scooter faster and more reliably. This matters most if you ride in traffic, on hills, or at higher speeds — the faster you go, the more stopping power you need.
Tire upgrades replace the solid rubber tires with pneumatic (air-filled) tires or higher-grip rubber compounds. Air-filled tires absorb bumps better and grip wet surfaces more reliably, but they can puncture and require occasional inflation. Upgraded rubber compounds improve grip without the puncture risk, though they wear out faster on rough pavement.
Brake kits usually cost $60 to $150, and tire kits run $40 to $100 per pair. These upgrades do not increase speed, but they make the scooter safer and more comfortable to ride, especially if you are heavier than the average rider or live somewhere with wet weather.
Checking compatibility before you buy
Not all upgrade kits fit all MX350 models. Razor has made several versions of the MX350 over the years, and parts from newer or older versions may not work with yours. Before ordering any kit, find your scooter's model number — it is usually printed on a sticker under the deck or on the battery — and check the kit's product page to confirm it lists your model.
You should also consider whether you have the tools and skills to install the upgrade yourself. Motor and battery upgrades often require opening the scooter's frame, disconnecting wiring, and reassembling everything correctly. If you are not comfortable doing this, you may need to pay a repair shop to install the kit, which can add $50 to $150 to the total cost. Brake and tire upgrades are usually simpler and can be done with basic tools.
Where to buy upgrade kits and what to watch for
Upgrade kits for the MX350 are sold by third-party manufacturers on Amazon, eBay, and specialty scooter retailers — not by Razor directly. Popular brands include Minimotors, Voro Motors, and various Chinese manufacturers. Prices and quality vary widely, so read reviews from other MX350 owners before buying.
Watch out for kits that make unrealistic claims about speed or range. If a kit promises to triple your speed or quadruple your range, it is probably overstating what the upgrade actually delivers. Look for reviews that include real-world test results, not just marketing language. Also check the return policy — some sellers will not take back opened kits, so you want to know that before you order.
Shipping times vary, especially for kits coming from overseas. If you need the upgrade quickly, check the estimated delivery date before you buy. Some kits take 4 to 8 weeks to arrive.
Warranty and safety concerns with upgraded scooters
Installing an upgrade kit voids Razor's warranty on the parts you modify. If your motor fails after an upgrade, Razor will not replace it for free. This is why it matters to buy kits from reputable manufacturers with their own warranties — some offer 6 to 12 months of coverage on the upgraded parts.
An upgraded scooter may also be less stable or harder to control if the changes are not balanced properly. A much heavier battery can shift the scooter's weight distribution, making it harder to steer. A much more powerful motor can cause the front wheel to lift off the ground during hard acceleration. If you are new to scooter riding, start with smaller upgrades — like better brakes or tires — before moving to motor or battery changes.
Frequently Asked Questions
Will a motor upgrade make my MX350 go twice as fast?
Not necessarily. A motor upgrade increases top speed, but the actual gain depends on your weight, the terrain, and the battery. A 500-watt motor might take you from 10 mph to 15 mph, while a 1000-watt motor might reach 20 to 25 mph. Heavier riders see smaller speed gains than lighter riders on the same kit.
Can I install an upgrade kit myself if I have never worked on a scooter before?
Tire and brake upgrades are usually straightforward with basic tools. Motor and battery upgrades require opening the scooter frame and handling electrical connections, which is riskier if you have no experience. If you are unsure, have a repair shop do the installation — the cost is worth avoiding damage to your scooter.
Do I need to upgrade the battery if I upgrade the motor?
Not always, but it is a good idea. A stronger motor drains the battery faster, so your range may drop even though your speed increases. If you want to keep your riding time the same, pair a motor upgrade with a battery upgrade.
What happens if my upgraded scooter breaks and I try to return it to Razor?
Razor will likely refuse the return or repair because the upgrade voids the warranty. This is why buying kits from manufacturers with their own warranties matters — you need coverage from someone if something goes wrong.
Are there any legal issues with riding an upgraded scooter?
Yes, depending on where you live. Many places have speed limits for electric scooters, and riding faster than the legal limit can result in fines. Some areas also restrict where you can ride scooters at all. Check your local laws before upgrading, especially if you are planning a motor upgrade.