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Best 4 stroke 49cc bicycle engine kits - Holiday Sale 2025

Last Updated - December 14, 2025

1
Best Choice

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Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

YSHUSTGY

100Cc Bicycle Engine Kit,4-Stroke Bicycle Gasoline Engine Motor Motorized Bicycle Kit with Double Belt Drive & Air-Cooling, Bike Engine Kit for Mountain Bikes, Road Bikes, Gravel Bikes, Beach Bikes

YSHUSTGY

$206.00

More Details
Main highlights
- Strong Power: The engine boasts a robust 3.5HP horsepower, a displacement of 100cc, a max power of 2kw/h, and a max rotating speed of 3600RPM, which provides you with strong power and accelerates your bike to a max speed of 50km/h.
- Quiet Operation: This bicycle engine kit only has slight noise (about 75dB) and vibration when used. You can use it in most outdoor environments without worrying about noise disturbance.
- Low Fuel Consumption: The 4-Stroke Bicycle Gasoline Engine Motor overhead valve is used, which effectively helps reduce carbon buildup and dramatically improves fuel savings. The air filter also improves air filtration performance and reduces wear, achieving a fuel consumption of around 0.66 gallons/100km and saving much money on fuel costs.
- Large Fuel Tank: 100cc Bicycle Engine Kit measures 11.41*5.9*6.29 inches with a large capacity of 0.52 gallons, allowing it to work for a long time. You don't need to fill the tank frequently, which is very convenient.
- Durable & Sturdy: The aluminum engine shell, iron fuel tank with baking paint, a 415# steel chain with rust prevention shot blasting process, and a rubber and nylon belt offer corrosion-resistance and wear-resistance, achieving a max bearing capacity of 440 pounds and ensuring superior performance and a longer lifespan.
$206.00
2
Best Value
11% Off

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Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

IMAYCC
11% Off

IMAYCC 100cc Bicycle Engine Kit 2 Stroke Motorized Bike Motor Conversion Kit Fit for 26-28" Bikes(100CC Black)

IMAYCC

$177.99

$199.99
(11% Off)

More Details
Main highlights
- 【Power Up Your Ride: 100cc Performance】Experience the thrill of enhanced speed and range. Come with a complete 100cc 2-stroke engine kit, delivering power/speed (2kw/6500rpm), converting your standard bicycle into a durable, long-distance capable machine. Perfect for extending your outdoor adventures and commuting with ease
- 【Engine Specs & Components】Engine type: single-cylinder, air-cooled, 2-stroke engine with CDI ignition and foot pedal start. Kit includes a rugged 44-tooth drive sprocket, 110 knots chain teeth, and 36-spoke wheel for strength. Engineered for consistent performance
- 【DIY-Friendly Installation with Support】The rider will need basic tools and mechanical aptitude, and about 2-4 hours of installation and fine tuning. We strongly recommend reviewing our detailed instructions and searching "IMAYCC Bicycle Engine Kit" on YouTube before starting. This prep work significantly smoothens the process and helps avoid common installation hurdles
- 【Broad Bike Compatibility】 Designed to fit most common 26-28" wheel bicycles featuring a V-frame design (ideal for Mountain, Cruiser, Road styles). Critical Requirement: Ensure at least 10 inches of clearance between your bike's bottom bracket and the top bar for proper fitment, especially 26" bike. Please confirm the installation space in advance, alternatively visit the ‘Contact Seller'
- 【3L Black Teardrop Fuel Tank】For optimal performance and engine longevity: Use 90# fuel mixed 16:1 (fuel:oil) initially, shifting to 20:1 after the 500km break-in period. Driving on a smooth road with a speed of 35-40km/h and a maximum speed limit of 50km/h, the fuel consumption is 2.5L per 100km
$177.99
$199.99 (11% Off)
3

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Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

ZERNEIL

ZERNEIL 49CC Gas Powered Bike Engine Motor Kit, 4-Stroke Engine Conversion Kit Air-Cooled Pull Start Petrol Bike Engine with Belt, OHV Motorized Bicycle Motor Full Set for Bicycle Scooter Bike

ZERNEIL

$129.99

More Details
Main highlights
- 🚲【Low Noise】Compared with a two-stroke engine, the four-stroke technology makes the operation more stable and quiet. And the quiet running process makes it more enjoyable when riding.
- 🚲【Large Capacity】The 49cc gas powered bike engine's fuel tank can hold 2 liters of gasoline, allowing you to use it for a longer period of time with a single fill-up.
- 🚲【High Efficiency】This 49cc pull start petrol bike engine is equipped a four-stroke engine, which allows for full gasoline combustion that reduces pollution to the environment, and it's more efficient compared to two-stroke ones.
- 🚲【Good Heat Dissipation】This engine is air-cooled to keep the heat dissipated while operation, extending the life of the engine.
- 🚲【Fast Speed】The maximum speed of this engine is between 27-32 mph. Once your bike is equipped with this 4-stroke bike engine motor kit, it can help you save more time and effort.
$129.99
4

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Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

HZOPUTLH

HZOPUTLH 100CC 4-Stroke Gasoline Engine Set, Bicycle Engine Kit (Belt Model) Motorized Bike Motor Kit, Hand Start Single Cylinder Motorized Bike Conversion Kit, Black, Silver

HZOPUTLH

$152.99

More Details
Main highlights
- WIDE APPLICATION: This 4-stroke gasoline engine set is suitable for mountain bikes, road bikes, gravel bikes, beach bikes, etc. with large triangular empty frames.
- STRONG POWER: This 4-stroke gasoline engine boasts a robust 3.5HP horsepower, a displacement of 100cc, a rated power of 2kw/h, and a max rotating speed of 3600RPM, which provides you with strong power and accelerates your bike to a max speed of 50km/h.
- LOW FUEL CONSUMPTION: The overhead valve is used, which effectively helps reduce carbon buildup and dramatically improves fuel savings. The air filter also improves air filtration performance and reduces wear, achieving a fuel consumption of around 0.66 gallons/100km and saving much money on fuel costs.
- LARGE FUEL TANK: This bicycle engine kit measures 11.41*5.9*6.29 inches with a large capacity of 0.52 gallons, allowing this motorized bike motor kit to work for a long time. You don't need to fill the tank frequently, which is convenient.
- DURABLE & STURDY: The aluminum engine shell, iron fuel tank with baking paint, a 415# steel chain with shot blasting process, and a nylon cover on the side of the engine, achieving a max bearing capacity of 440 pounds and ensuring superior performance and a longer lifespan.
$152.99
5

✖
Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

YUNLAIGOTOP

YUNLAIGOTOP 100cc Bicycle Motor Kit, 4-Stroke Bicycle Gasoline Engine Motor, Motorized Bicycle Kit with Double Belt Drive & Air-Cooling, Bike Engine Kit for Bikes (with Belt)

YUNLAIGOTOP

$155.98

More Details
Main highlights
- 【HIGH QUALITY & DURABLE】- The motorized bike kit is made of high-performance aluminum alloy body, which the gas bike kit is strong and durable with metallic luster. The engine casing is made of strong and durable plastic that covers the engine body and fully protects the engine from damage
- 【CUSTOMER SERVICE】- We aim to provide quality products and services. If you have any problems, please feel free to contact us. We will reply and solve the problem for you as soon as possible
- 【BIKE MOTOR KIT】- About bicycle engine kit is Type: Forced Air Cooling, 4-Stroke, OHV, Single-cylinder, Inclined by 25 Degrees; Starting System: Recoil Start; Max Output: 3HP; Rated Power: 2KW/3600rpm; Max. Torque: 4.5N.m/2500rpm; Fuel Tank Capacity: 1.6L/0.42gal; Min. Stable Speed Unloaded: 3600rpm; Displacement: 100cc
- 【44 TOOTH BIKE MOTOR KIT】- The 4 stroke bicycle engine kit converts your bike into an e-bike with a maximum speed of 3600rpm, which is efficient and convenient, allowing you to fully enjoy riding during commuting and short trips
- 【4 STROKE BICYCLE ENGINE KIT】- The bicycle motor kit are more stable, reliable and quieter than two-stroke engines. At the same time, the 56mm bore cylinders increase load carrying capacity and lower operating temperatures, making them easier to start while providing continuous output over a range of speeds
$155.98

Best 4 stroke 49cc bicycle engine kits - Holiday Sale 2025

100Cc Bicycle Engine Kit,4-Stroke Bicycle Gasoline Engine Motor Motorized Bicycle Kit with Double Belt Drive & Air-Cooling, Bike Engine Kit for Mountain Bikes, Road Bikes, Gravel Bikes, Beach Bikes

IMAYCC 100cc Bicycle Engine Kit 2 Stroke Motorized Bike Motor Conversion Kit Fit for 26-28" Bikes(100CC Black)

ZERNEIL 49CC Gas Powered Bike Engine Motor Kit, 4-Stroke Engine Conversion Kit Air-Cooled Pull Start Petrol Bike Engine with Belt, OHV Motorized Bicycle Motor Full Set for Bicycle Scooter Bike

HZOPUTLH 100CC 4-Stroke Gasoline Engine Set, Bicycle Engine Kit (Belt Model) Motorized Bike Motor Kit, Hand Start Single Cylinder Motorized Bike Conversion Kit, Black, Silver

YUNLAIGOTOP 100cc Bicycle Motor Kit, 4-Stroke Bicycle Gasoline Engine Motor, Motorized Bicycle Kit with Double Belt Drive & Air-Cooling, Bike Engine Kit for Bikes (with Belt)

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