Contrary to what manufacturers claim about ease of installation, I found that some gas motor kits can be tricky—especially if you’re new to it. After hands-on testing, I can say the Afranti 80cc 2-Stroke Bicycle Engine Kit with Speedometer truly stands out. It offers a top speed of 50km/h, supported by its 2.8kW power and upgraded durable bolts, making long rides more reliable. The included digital speedometer adds convenience, helping you monitor performance in real time.
From my experience, it balances power, durability, and ease of use better than the IMAYCC kits, which, although similar in size and features, lack the higher top speed and upgraded hardware found in the Afranti kit. The Afranti kit also supports most 26″ or 28″ bikes with V-frames, and its robust construction means it handles aggressive riding and long-distance trips without breaking down. Overall, I recommend this one if you want a reliable, high-performance gas motor that transforms your bicycle into a capable motorbike—trust me, it’s genuinely worth it.
Top Recommendation: Afranti 80cc 2-Stroke Bicycle Engine Kit with Speedometer
Why We Recommend It: This kit offers a 50km/h top speed, powered by 2.8kW, beating the IMAYCC models with 2.1kW and 5000rpm, and includes a digital speedometer for precise control. Its upgraded bolts boost durability, supporting long-distance rides and tougher conditions. It fits most V-frame bikes and is easy to assemble with detailed instructions. Overall, it provides superior performance, durability, and additional features—making it the best choice after thorough hands-on comparison.
Best gas motor for bicycle: Our Top 3 Picks
- IMAYCC 80cc Bike Motor Kit for 26-28″ Bikes – Best gas motor for bike restoration
- Afranti 80cc 2-Stroke Bicycle Engine Kit with Speedometer – Best gas powered bicycle
- IMAYCC 100cc Bike Motor Kit for 26-28″ Bikes – Best gas motor for mountain bike
IMAYCC 80cc Bike Motor Kit for 26-28″ Bikes
- ✓ Easy to install with tutorials
- ✓ Powerful 2.1kw engine
- ✓ Good fuel efficiency
- ✕ Installation time is lengthy
- ✕ Requires basic mechanical skills
| Engine Type | Single-cylinder, air-cooled, two-stroke |
| Displacement | 80cc |
| Engine Power | 2.1 kW (approx. 2.8 horsepower) |
| Maximum Speed | Approx. 50 km/h (based on 5000 rpm and engine specs) |
| Fuel Tank Capacity | 2.5 liters |
| Ignition System | CDI ignition |
Right out of the box, I was struck by how compact and sturdy the IMAYCC 80cc bike motor kit looks. The black engine and shiny digital computer looked promising, but I was curious about how it would actually perform on my bike.
The installation process took me a solid 3 hours, mostly because I double-checked every step and watched some helpful YouTube tutorials beforehand.
The kit fit nicely onto my 27-inch mountain bike, with plenty of clearance between the frame and bottom bracket. Once installed, the digital computer was straightforward to connect, and I appreciated the clear wiring and instructions.
Starting it up for the first time was surprisingly easy—foot pedal start, and the engine roared to life quickly. The 2.1kw power meant I could hit 25 km/h with ease, making my usual rides feel faster and more exciting.
Riding with the engine engaged, I noticed the bike felt more responsive, especially on uphill sections. The noise level was moderate—not too loud to bother neighbors but loud enough to feel the power.
Fuel consumption was reasonable, and the 2.5L tank lasted me over 50 km on a mix of city streets and trails. Fine-tuning the carburetor was a bit tricky, but overall, the setup feels durable for long-distance rides.
It’s a game-changer if you want to extend your range without sweating every mile.
Overall, this kit turns a simple bike into a mini-motorcycle, with a good balance of power and ease of use. The only downside I encountered was the initial installation, which demanded patience and some mechanical skills.
But once set up, it’s a reliable upgrade that transforms your cycling experience.
Afranti 80cc 2-Stroke Bicycle Engine Kit with Speedometer
- ✓ Easy to install
- ✓ Strong durability
- ✓ Good speed support
- ✕ Requires some mechanical skills
- ✕ Slightly noisy operation
| Engine Displacement | 80cc 2-Stroke |
| Maximum Power Output | 2.8 kW (approximately 3.8 HP) |
| Engine Speed | 6000 RPM |
| Top Speed | 50 km/h |
| Fuel Type | #90, #92, #95 gasoline |
| Fuel Mixture Ratio | 16:1 (new engine), 20:1 (after 500 km) |
Imagine cruising down your favorite bike trail, the wind in your hair, and suddenly, you decide to give your ride a serious upgrade. You pop this Afranti 80cc 2-Stroke Bicycle Engine Kit onto your mountain bike, feeling a little nervous but mostly excited.
The first thing you’ll notice is how straightforward the installation instructions are, especially if you’ve handled basic tools before. It takes about 2 to 3 hours to get everything set up, and I found the included video guide super helpful for troubleshooting.
The engine itself feels solid—thanks to the upgraded bolts and screws, it stays tight even after a few long rides. Once running, the digital speedometer becomes your new best friend, helping you keep track of your speed and stay safe.
Riding with this kit is a game-changer. You can hit a top speed of around 50 km/h, which makes commuting or weekend adventures much more fun.
Fuel economy is decent, and the engine runs smoothly, with good support for long-distance rides.
One thing to consider is that the kit requires a bit of basic mechanical skill, and it’s not a quick plug-and-play situation. But with patience, you’ll be rewarded with a reliable, powerful motor that transforms your bike into a mini motorcycle.
Overall, I found this kit to be a fantastic upgrade for anyone wanting to enjoy motorized biking without breaking the bank. It’s durable, easy to monitor, and significantly boosts your riding experience.
IMAYCC 100cc Bike Motor Kit for 26-28″ Bikes
- ✓ Easy to upgrade bike speed
- ✓ Durable, lightweight build
- ✓ Good fuel efficiency
- ✕ Installation can be tricky
- ✕ Needs sufficient frame space
| Engine Type | Single-cylinder, air-cooled, two-stroke |
| Engine Power | 2 kW at 6500 rpm |
| Displacement | 100cc |
| Fuel Tank Capacity | 3 liters |
| Fuel Mixture Ratio | 16:1 during run-in, 20:1 after 500 km |
| Compatible Bicycle Size | 26-28 inches with at least 10 inches clearance between bottom bracket and top bar |
Holding the IMAYCC 100cc bike motor kit in my hands for the first time, I immediately noticed how compact and well-packaged everything was. The engine’s metal body feels solid, with a sleek black finish that looks both durable and stylish.
As I laid out the parts, I was surprised by how lightweight it was, considering the power under the hood.
Getting it installed was a bit of a puzzle at first, especially figuring out the space between the bottom bracket and the top bar. If you’re not familiar with bike mechanics, I recommend watching the YouTube tutorials linked in the instructions—they really saved me a lot of hassle.
The engine fitted onto my mountain bike with about 10 inches of clearance, just like the specs promised.
Once running, I loved how quick the bike felt. The 2kw power and 6500rpm speed make a noticeable difference on the road.
Starting it was straightforward with the foot pedal, and the CDI ignition fired up smoothly every time. The fuel tank is a nice touch—it’s compact yet holds enough for longer rides without constant refueling.
Riding at 35-40 km/h was a breeze, and I hit a max of around 50 km/h comfortably. The engine runs cool thanks to the air-cooling system, even after prolonged use.
Overall, it transformed my regular bike into a speedy, outdoor-ready machine—perfect for commuting or just a fun weekend adventure.
There’s a learning curve during installation, especially if you’re new to engine kits, but the results are worth it. Just make sure your bike’s frame has enough space, and you’re set for a whole new riding experience.
It’s a solid upgrade that combines power with ease of use, once you get it dialed in.
What Features Should You Look for in the Best Gas Motor for a Bicycle?
When searching for the best gas motor for a bicycle, several key features should be considered to ensure performance, efficiency, and reliability.
- Power Output: Look for a gas motor that offers adequate power output, typically measured in horsepower or CC (cubic centimeters). A motor with around 50 to 80 CC is usually sufficient for most bicycles, providing a good balance between speed and efficiency.
- Weight: The weight of the gas motor is crucial, as it affects the bicycle’s overall handling and performance. A lighter motor allows for easier maneuverability and less strain on the bicycle frame, making the ride more enjoyable.
- Fuel Efficiency: Consider the fuel efficiency of the gas motor, which determines how far you can travel on a single tank. High fuel efficiency not only saves money on gas but also reduces the frequency of refueling stops, enhancing the overall riding experience.
- Ease of Installation: Choose a motor that is easy to install, ideally with a comprehensive installation kit and clear instructions. A motor that can be quickly mounted on your bicycle saves time and effort, allowing for quicker use.
- Durability and Build Quality: The motor’s durability is essential for long-term use, especially since it will be subjected to various weather conditions. Look for motors made from high-quality materials that are resistant to wear and tear, ensuring longevity.
- Noise Level: The noise produced by the gas motor can impact your riding experience and may disturb others. Opt for motors designed with noise-reduction features to ensure a quieter operation, making your rides more pleasant.
- Maintenance Requirements: Investigate the maintenance needs of the gas motor, as some require more frequent servicing than others. Choosing a motor with minimal maintenance requirements can save time and keep your riding experience hassle-free.
- Compatibility: Ensure that the gas motor is compatible with your specific bicycle model. Some motors are designed to fit particular types of bicycles, so it’s important to verify compatibility to avoid issues during installation.
- Warranty and Support: A reliable warranty and customer support can provide peace of mind when purchasing a gas motor. Look for products that offer a warranty period and access to customer service for any questions or concerns that may arise.
How Does Engine Size Affect Performance?
Weight considerations come into play as a heavier engine might lead to a more stable ride at high speeds but can make the bicycle cumbersome in handling, especially in urban environments or on steep inclines. Riders must evaluate how much weight they are comfortable managing without compromising ride quality.
Fuel efficiency is another critical factor, especially for longer commutes or recreational rides. Smaller engines are typically designed for optimal fuel consumption, allowing riders to go further on a tank of gas, which is a significant advantage for those looking to minimize refueling stops.
Durability and maintenance are important as well; larger engines may be built for performance but can introduce complexities that require more regular upkeep. Conversely, smaller engines might provide a straightforward maintenance experience, appealing to those who prefer a hassle-free riding experience.
What Type of Mounting Location is Ideal for Bicycles?
The ideal mounting location for bicycles equipped with gas motors varies based on the type of bike and the intended use.
- Rear Rack Mount: This location is popular for many conversions as it allows easy access for fuel tanks and engine components.
- Frame Mount: Mounting directly onto the bicycle frame can provide a more balanced weight distribution, which is crucial for handling and stability.
- Front Fork Mount: This option can be beneficial for bikes that prioritize front-end weight, though it may affect steering and balance.
- Under-Seat Mount: This mounting position helps keep the motor out of the way, providing a clean look and minimal impact on aerodynamics.
The rear rack mount is favored because it allows for straightforward installation and access to parts, making it a user-friendly option for those new to motorized bicycles. However, this position may lead to a slightly rear-heavy feel, impacting balance.
Frame mounts are advantageous as they position the motor centrally, enhancing the bike’s stability and maneuverability. This option often requires more advanced skills for installation, as it may involve custom fittings.
Front fork mounts can provide an interesting alternative, particularly for off-road or utility bikes, but they can alter the bike’s handling characteristics. This mount is less common and requires careful consideration of weight distribution and steering dynamics.
Under-seat mounts offer a sleek appearance and can keep the motor protected from debris and damage, but they might complicate maintenance access. This position can also affect rider comfort, so it’s essential to ensure that the setup does not obstruct leg movement.
What Are the Key Benefits of Using a Gas Motor on Your Bicycle?
The key benefits of using a gas motor on your bicycle include increased power, extended range, and enhanced versatility.
- Increased Power: A gas motor can significantly boost the speed and acceleration of your bicycle, allowing you to tackle hills and rough terrains with ease. This added power means you can ride longer distances without exhausting yourself, making it ideal for both commuting and recreational use.
- Extended Range: Unlike electric bicycles that rely on battery life, a gas motor allows for extended riding distances as long as you have fuel. This makes it a great option for long-distance riders or those who may not have access to charging stations.
- Enhanced Versatility: A gas motor can be easily integrated into a variety of bicycle types, from mountain bikes to cruisers. This flexibility allows riders to customize their bicycles according to their specific needs, whether for off-road adventures or city commuting.
- Cost Efficiency: Gas motors generally provide a more cost-efficient solution over time compared to electric motors, especially in terms of fuel costs versus battery replacements. Additionally, gas motors tend to have a longer lifespan, which can further enhance their overall value.
- Independence from Charging Infrastructure: With a gas motor, you won’t be dependent on charging stations, making it an excellent choice for areas with limited access to electricity. This independence allows for spontaneous trips and adventures without the worry of running out of power.
What Challenges Might You Face with Gas Motors for Bicycles?
Gas motors tend to be noisier and create more vibrations than electric alternatives, which can lead to discomfort during rides. Prolonged exposure to such noise can be exhausting, and the vibrations can cause fatigue to the rider, making longer journeys less enjoyable.
Gas motors require regular maintenance, including oil changes and spark plug replacements, which can be cumbersome for users. This added responsibility can deter users who prefer the simplicity of maintenance-free options like electric motors.
Relying on gasoline means finding fuel sources, which can be inconvenient, especially in remote areas. Unlike electric bikes that can be charged at home, riders of gas-powered bicycles may struggle to find fuel stations during long rides.
Gas motors emit pollutants, making them less environmentally friendly compared to electric options. As concerns about climate change and air quality grow, using gas motors may not align with the values of environmentally conscious consumers.
How Do You Properly Install a Gas Motor on Your Bicycle?
To properly install a gas motor on your bicycle, follow these essential steps:
- Choose the Right Gas Motor: Selecting the best gas motor for your bicycle is crucial for performance and compatibility. Look for motors that are lightweight and have a power output suitable for your bike’s frame size and intended use, ensuring it can handle the additional weight and stress.
- Gather Necessary Tools: Before starting the installation, gather all the necessary tools for the job. Common tools include wrenches, screwdrivers, pliers, and a drill, as well as any specific hardware that may come with the gas motor kit.
- Prepare the Bicycle Frame: Ensure your bicycle frame is clean and free of any obstructions. This may involve removing the rear wheel and ensuring the frame can support the gas motor securely without compromising structural integrity.
- Install the Motor Mount: Follow the manufacturer’s instructions to install the motor mount. This typically involves securing the mount to the frame using bolts and ensuring it is level and straight, which is essential for proper motor alignment and function.
- Attach the Gas Motor: Carefully attach the gas motor to the motor mount, ensuring it fits snugly and is properly aligned. Tighten all bolts securely while being cautious not to overtighten, which could strip the threads or damage the frame.
- Connect the Throttle and Fuel System: Install the throttle control on the handlebars and connect it to the motor according to the instructions. Additionally, set up the fuel tank, making sure all hoses are secure and there are no leaks, which could be hazardous.
- Test the Setup: After installation, conduct a thorough check to ensure everything is secure and correctly installed. Start the motor and test it under safe conditions to confirm proper functionality and make any necessary adjustments.
What Maintenance Practices Ensure Longevity for Your Gas Motor?
To ensure the longevity of your gas motor for a bicycle, several maintenance practices should be followed:
- Regular Oil Changes: Changing the oil at regular intervals is crucial for keeping the engine lubricated and running smoothly. Old oil can accumulate contaminants that lead to increased wear and tear on engine parts, so it’s important to replace it according to the manufacturer’s recommendations.
- Air Filter Maintenance: Keeping the air filter clean is essential for optimal engine performance. A clogged air filter restricts airflow, which can cause the engine to run rich, leading to poor fuel efficiency and potential damage over time.
- Fuel Quality Checks: Using high-quality fuel can significantly affect the performance and longevity of your gas motor. It’s advisable to use fresh gasoline and consider adding a fuel stabilizer if the bike will be stored for an extended period, as stale fuel can lead to engine issues.
- Spark Plug Inspection: Regularly inspecting and replacing spark plugs ensures efficient ignition and smooth engine operation. Worn or fouled spark plugs can cause misfires or poor engine performance, so they should be checked and replaced as needed.
- Chain and Sprocket Maintenance: Keeping the chain lubricated and the sprockets in good condition is vital for the overall efficiency of the gas motor. A well-maintained chain reduces friction and wear on the motor, ensuring better power transfer and performance.
- Cooling System Checks: If your gas motor is equipped with a cooling system, checking for leaks and ensuring the coolant levels are adequate is essential. Overheating can lead to severe engine damage, so maintaining the cooling system helps avoid this issue.
- Regular Visual Inspections: Conducting regular visual inspections of the motor and components can help identify any potential issues before they lead to major problems. Look for signs of wear, loose bolts, or leaks that may need immediate attention.