Want your scooter to go faster? Can you make your 50cc scooter faster? Yes, you can! The fastest way often involves a mix of engine tweaks, part upgrades, and smart riding. Many shops or experienced riders can help you. This guide will show you how to boost your scooter’s speed. We will cover both gas and electric models. We will look at what to do, how it works, and what you need to know.
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Grasping the Basics: Speed, Safety, and Rules
Before you make any changes, think about a few things. Speed is fun, but safety comes first. Making your scooter faster can change how it handles. It can also change how fast it stops. Always ride safe. Wear good gear.
Many places have speed limits for scooters. These are for public roads. Making your scooter faster might break these rules. It could even make your scooter illegal to ride on the street. Always check your local laws. Also, changing parts can void your warranty. This means the company will not fix it for free if it breaks.
Important Checks Before You Start
- Is your scooter safe to go faster?
- Do your brakes work well?
- Is your frame strong?
- Will your tires handle more speed?
- Do you know the local laws about scooter speed?
- Are you okay with losing your warranty?
Boosting Gas Scooter Speed: What You Can Do
Most smaller gas scooters, especially 50cc models, come with limits. These limits keep them slow. Removing these limits can make a big difference. This is called derestricting. After that, you can add new parts.
Derestricting Your 50cc Scooter: Opening Up Power
Many 50cc scooters are limited from the factory. This is often to meet legal rules. Taking these limits off can make your scooter much quicker. This process is called derestricting. You can often do it yourself. Or a mechanic can help.
How to Derestrict a 50cc Scooter
Derestricting a 50cc scooter often means changing a few small parts. These parts limit power.
* Variator Washer: This is a common limit. A small washer sits in the variator. It stops the drive belt from going all the way up. This keeps top speed low. Taking it out lets the belt move freely. This means more top speed.
* Exhaust Baffle: Some exhaust pipes have a small metal cone inside. This cone restricts gas flow. It makes the engine work less efficiently. Removing it helps exhaust gases leave faster. This gives more power.
* CDI Unit Limit: The CDI (Capacitor Discharge Ignition) unit controls spark timing. Some CDIs have a speed limiter. It cuts the spark at a certain RPM. Replacing the CDI with an “unrestricted” one removes this limit. This lets the engine rev higher. It means more speed.
* Carburetor Jet Size: A smaller jet limits fuel flow. This makes the engine run lean. It can limit power. A larger jet lets more fuel in. This can give more power. But you need to match it to other changes.
| Derestriction Method | What It Does | Effect on Speed | Skill Level |
|---|---|---|---|
| Variator Washer | Stops belt from reaching full range | Increases top speed | Easy |
| Exhaust Baffle | Restricts exhaust gas flow | Increases power | Medium |
| CDI Unit | Limits engine RPM | Increases top speed | Easy/Medium |
| Carburetor Jet | Controls fuel flow | Increases power | Medium |
Scooter Engine Tuning: Getting the Most Out of Your Motor
Good engine tuning makes a big difference. It helps your scooter run at its best. This means more power and speed. Scooter engine tuning involves checking and changing key parts.
Essential Engine Checks
- Air Filter: A dirty air filter chokes the engine. It stops air from getting in. A clean filter helps your engine breathe. This means more power. You can also get a “performance” air filter. These let more air in.
- Spark Plug: A good spark plug gives a strong spark. This burns fuel better. Make sure your spark plug is clean. Replace it often. Use the right type for your scooter.
- Carburetor Cleaning and Jetting: Over time, carburetors get dirty. This affects fuel mix. Cleaning it helps. Jetting means changing the tiny brass “jets.” These control fuel flow. If you change other parts (like exhaust or air filter), you might need to change jets. This helps the engine get the right fuel-air mix.
- Valve Adjustment: If your scooter has valves (most 4-stroke engines do), they need to be set right. Loose or tight valves hurt power. They can also damage the engine. Check and adjust them as needed.
- Oil Type and Changes: Use the right oil. Change it often. Fresh, clean oil reduces friction. This makes the engine run smoother. It can free up a tiny bit of power.
Drivetrain Upgrades: Power to the Wheel
The drivetrain sends power from the engine to the wheel. Upgrading these parts can greatly improve how your scooter gets moving. It can also help with top speed.
Scooter Variator Upgrade
The variator is like an automatic gearbox. It changes gear ratios. It lets the engine stay at its best RPM for speed. A good scooter variator upgrade can make a big difference. It changes how power gets to the wheel.
* Performance Variators: These are designed better. They allow for quicker shifts. They can help your engine stay in its “power band” longer. This means faster acceleration. It can also mean a higher top speed.
Roller Weights Scooter
Inside the variator are small weights. These are called roller weights. Their weight affects how the variator works. Lighter weights let the engine rev higher faster. This gives better acceleration. Heavier weights make the variator shift up earlier. This can help with top speed. But it might hurt acceleration.
* Finding the Right Weights: You might need to try different weights. It depends on your riding style. It also depends on other engine changes. It’s a balance between quick takeoff and high speed.
* Example: If your scooter feels slow off the line, try slightly lighter roller weights. If it hits high RPMs but doesn’t gain speed, try slightly heavier ones.
| Roller Weight Change | Effect on Engine RPM | Effect on Acceleration | Effect on Top Speed |
|---|---|---|---|
| Lighter Weights | Higher at takeoff | Better | Can be lower |
| Heavier Weights | Lower at takeoff | Worse | Can be higher |
Clutch Springs
The clutch connects the engine to the drivetrain. Clutch springs control when the clutch engages. Stiffer clutch springs make the clutch grab at higher RPMs. This means the engine builds more power before moving. This can improve scooter acceleration from a stop. You will feel a harder “kick” when you start moving.
Performance Drive Belt
The drive belt transfers power from the variator to the clutch. A worn belt can slip. It loses power. A new, strong performance belt can handle more power. It will not slip. This means all the engine’s power gets to the wheel.
Scooter Exhaust Upgrade: Letting It Breathe
The exhaust system gets rid of burnt gases. A stock exhaust can be very limiting. It often has baffles and tight bends. These slow down gas flow. A scooter exhaust upgrade can free up power.
Benefits of a Performance Exhaust
- Better Gas Flow: Performance exhausts are designed for smooth flow. They have fewer restrictions. This lets gases leave the engine faster. This makes the engine more efficient. It gives more power.
- Weight Saving: Aftermarket exhausts are often lighter. Less weight means faster acceleration.
- Sound: They often make a sportier sound.
- Power Boost: You can see a noticeable power gain. This helps both acceleration and top speed. But you may need to adjust your carburetor jetting with a new exhaust. This is key for the engine to run right.
Bigger Engine Parts: Advanced Power Boosts
These changes are more serious. They involve opening the engine. They cost more money. They need more skill.
Big Bore Kit for Scooter
A big bore kit for scooter is a big change. It replaces your engine’s cylinder and piston. The new cylinder has a bigger diameter. This makes the engine bigger. For example, a 50cc scooter might become a 70cc or even 90cc.
* Huge Power Increase: A bigger engine makes a lot more power. This gives much better acceleration. It also greatly increases moped top speed.
* Risks: A big bore kit puts more stress on other engine parts. The crankshaft or bearings might not handle it. It can reduce engine life. It also makes your scooter illegal for public roads in many places. It’s a major mod. You will likely need a bigger carburetor and possibly a stronger crankshaft.
Performance Camshafts
The camshaft controls when valves open and close. A performance camshaft opens valves differently. It lets more air and fuel into the engine. It also lets exhaust gases leave faster. This can give a power boost. But it works best with other upgrades like a performance exhaust.
Cylinder Head Work
You can port the cylinder head. This means smoothing the passages where air and fuel enter. It also means smoothing where exhaust gases leave. This makes flow better. It can give more power. This is a very skilled job. It is not for beginners.
Fuel System Optimizations: Feeding the Beast
More power needs more fuel. Your stock fuel system might not keep up with a modified engine.
Bigger Carburetor
If you have a big bore kit or performance exhaust, you might need a bigger carburetor. A larger carb lets more air and fuel mix. This feeds the bigger, hungrier engine. It’s key for getting full power from major upgrades.
Performance Fuel Pump
Some scooters use a fuel pump. A performance fuel pump can deliver more fuel faster. This ensures the carburetor always has enough fuel, even at high RPMs.
Electric Scooter Speed Upgrade: Boosting Your Watts
Electric scooters work differently. They do not have engines or exhaust. Their speed comes from motor power and battery strength. An electric scooter speed upgrade focuses on these parts.
Powering Up Your Electric Ride
Motor Upgrade
The motor is what drives your electric scooter. A more powerful motor means more speed and torque. You can replace your existing motor with a higher-wattage one.
* Wattage: Higher watts mean more power. A 500W motor will be faster than a 250W motor.
* Motor Type: Hub motors (in the wheel) are common. Mid-drive motors (connected by a chain or belt) can offer different power delivery.
Battery Voltage and Capacity
The battery powers the motor.
* Voltage (V): Higher voltage means more speed. A 48V battery will give more speed than a 36V battery, assuming the motor and controller can handle it.
* Amp-Hours (Ah): This is battery capacity. Higher Ah means longer range. It does not directly mean more speed, but a higher-capacity battery can better sustain high-speed draws.
* Upgrading: You might need a new battery with higher voltage. Or you might add another battery in series to increase voltage. Be very careful. This can be dangerous if done wrong.
Controller Upgrade
The controller is the “brain” of an electric scooter. It manages power from the battery to the motor. Stock controllers often limit speed or power.
* Higher Amps: A performance controller can handle more amps. This lets more power flow to the motor. This gives more speed and acceleration.
* Programmable Controllers: Some controllers can be programmed. You can change settings like speed limits, acceleration curves, and power output. This is a common way to unlock more speed.
Firmware Flashing
Some electric scooters have software (firmware) that limits speed. Flashing new firmware can remove these limits. It can unlock the full power of the motor and battery. This is like derestricting a gas scooter’s CDI. But be careful. Wrong firmware can “brick” your scooter.
Tire Choice
Tires play a role too.
* Road Tires: Smoother road tires have less rolling resistance. This means more speed.
* Tire Pressure: Correct tire pressure reduces drag. It helps your scooter go faster.
General Tips for All Scooters: Small Gains Add Up
Beyond specific parts, small changes and good habits can also make your scooter faster.
Aerodynamics: Cutting Through the Air
Air drag is a big enemy of speed. The faster you go, the more air tries to push you back.
* Riding Position: Tuck in. Get low. This makes your body smaller. It reduces air drag.
* Windshields: Some windshields can create more drag if not designed well. Others can help.
* Remove Unneeded Stuff: Heavy or bulky items sticking out can add drag.
Weight Reduction: Less Weight, More Speed
Every pound matters. Lighter scooters are faster scooters.
* Remove Extra Parts: Do you really need that huge top box? Or extra passenger pegs?
* Lighter Parts: If you replace parts, choose lighter ones. Carbon fiber or aluminum parts can save weight.
* Your Weight: The lighter the rider, the faster the scooter will go.
Tire Pressure: The Right Amount of Air
Make sure your tires are at the right pressure.
* Too Low: Flat tires create more drag. They make your scooter slower. They also wear out faster.
* Too High: Too much pressure can make the ride harsh. It can reduce grip.
* Check Manual: Always use the pressure listed in your scooter’s manual.
Riding Technique: Smooth and Smart
How you ride affects speed.
* Smooth Throttle: Do not just yank the throttle. Roll it on smoothly.
* Cornering: Smooth turns keep your speed up. Hard braking and accelerating out of turns wastes energy.
* Anticipate: Look ahead. Avoid sudden stops. Keep your momentum.
Regular Maintenance: Keeping It Fresh
A well-maintained scooter is a fast scooter.
* Cleanliness: A clean scooter runs better. Dirt can add weight or clog parts.
* Lubrication: Keep moving parts greased. This reduces friction.
* Checks: Regularly check brakes, tires, lights, and all bolts.
Improving Scooter Acceleration: Quick Take-Offs
Many upgrades help both top speed and acceleration. But some focus more on getting you off the line fast.
- Gas Scooters:
- Lighter Roller Weights: These are your best friend for quick starts. They let your engine rev higher faster.
- Stiffer Clutch Springs: These make the clutch engage at higher RPM. This means more power from the start.
- Performance Exhaust: Helps clear gases faster. This gives a quicker power response.
- Derestriction: Removing limits like the variator washer or CDI cap. This lets the engine reach full power sooner.
- Big Bore Kit: This is the ultimate. More engine size means way more power for acceleration.
- Electric Scooters:
- Higher Amp Controller: Sends more power to the motor instantly.
- Higher Voltage Battery: More voltage means more immediate power.
- Motor Upgrade: A motor with higher torque (often linked to higher wattage) will make it accelerate faster.
Increasing Moped Top Speed: Reaching New Limits
Want to go as fast as possible? These changes focus on getting to higher speeds.
- Gas Scooters:
- Removing Variator Washer: Essential for reaching full belt travel.
- Unrestricted CDI: Lets the engine rev to its true maximum.
- Heavier Roller Weights (sometimes): Can sometimes give a small boost to top speed by allowing the variator to shift out fully at lower engine RPM, but balance is key.
- Performance Exhaust: Better flow at high RPM helps.
- Big Bore Kit: This is the most effective way to greatly increase moped top speed. More engine size means more power to fight air drag.
- Longer Gearing (less common): Some scooters can have different final drive gears. Longer gears mean more top speed, but less acceleration.
- Electric Scooters:
- Higher Voltage Battery: Directly increases potential top speed.
- Higher Wattage Motor: More power translates to higher top speeds.
- Unrestricted Controller/Firmware: Removes any built-in speed limits.
Important Considerations: Beyond Speed
Making your scooter faster is exciting. But remember these points.
Legality: Stay on the Right Side of the Law
- Local Rules: Speed limits and engine size rules vary. In some places, a 50cc scooter is a “moped.” It has special rules. Making it 70cc might make it a “motorcycle.” This needs a different license.
- Insurance: Modified scooters might not be covered by your insurance. Tell your insurance company about changes.
- Registration: If you change the engine size, you might need to re-register your scooter.
Safety: Can Your Scooter Handle It?
- Brakes: Faster speed means you need better brakes. Are your stock brakes good enough? Consider upgrading brake pads or even whole brake systems.
- Suspension: At higher speeds, good suspension keeps your wheels on the road. It helps with control. Your stock suspension might be too soft.
- Tires: Good tires are vital. They give grip. They handle heat better at higher speeds.
- Frame: Is your scooter’s frame strong enough for more power and speed? Some cheaper frames might flex too much.
Reliability: Will It Last?
- Stress: More power puts more stress on all parts. The engine, transmission, and frame.
- Wear and Tear: Parts will wear out faster. You might need more frequent maintenance.
- Engine Life: A big bore kit, for example, often shortens engine life.
Cost vs. Benefit: Is It Worth It?
- Money Spent: Big upgrades cost a lot. Will you get enough extra speed for the money?
- Your Needs: Do you need a lot more speed? Or just a little more zip?
- Resale Value: Heavily modified scooters can be harder to sell. Or they might be worth less.
Professional Help vs. DIY: Who Should Do the Work?
- Simple Mods: Derestricting or changing roller weights might be DIY friendly.
- Complex Mods: Big bore kits, engine tuning, or electrical upgrades are best left to experts. A wrong step can ruin your scooter. Or it can be dangerous.
- Tools and Knowledge: Do you have the right tools? Do you know what you are doing? If not, find a good mechanic.
Frequently Asked Questions (FAQ)
Q: Will making my scooter faster void my warranty?
A: Yes, almost always. Any non-factory change to your engine or drivetrain will likely void the warranty.
Q: Is it illegal to derestrict a 50cc scooter?
A: It depends on your local laws. In many places, derestricting a 50cc scooter to go over a certain speed (e.g., 30 mph or 50 km/h) makes it illegal for public road use without proper licensing, registration, and insurance for a motorcycle. Always check your local Department of Motor Vehicles rules.
Q: How much speed can I gain from simple changes?
A: Simple changes like derestricting a 50cc scooter or tuning an electric scooter can add 5-15 mph (8-24 km/h) to your top speed. More complex changes like a big bore kit or major motor upgrades can add much more.
Q: Can I make my scooter faster for free?
A: Not much. Some free tips include proper tire pressure, removing extra weight, and improving your riding position. But major speed gains usually need part changes.
Q: Do I need to change my brakes if I make my scooter faster?
A: It is strongly recommended. If your scooter goes faster, you need to stop faster. Stock brakes might not be good enough for higher speeds. Upgrading brake pads or the whole brake system is a wise safety step.
Q: What is the most important part to upgrade for speed?
A: For gas scooters, derestriction and a variator upgrade often give the best bang for your buck. For electric scooters, a controller and battery voltage upgrade are key. For maximum speed, a big bore kit (gas) or a higher voltage battery with a powerful motor (electric) is needed.
Q: Will making my scooter faster hurt its fuel economy?
A: Yes, usually. More power often means using more fuel. Especially with upgrades like big bore kits or performance exhausts.
Q: How can I improve my scooter’s acceleration without losing top speed?
A: For gas scooters, a good variator setup with the right roller weights, and potentially stiffer clutch springs, can improve acceleration without hurting top speed too much. A performance exhaust helps both. For electric scooters, a better controller and motor will boost both.
Making your scooter faster is a fun project. But it needs careful thought. Always put safety and legality first. Start with small changes. See how they feel. And if you are not sure, ask for help from an expert. Enjoy the ride!