Best 100Cc Motor For Bicycle: Compare 10 Engine Kits

#1 · Best Overall

1. IMAYCC 100cc Kit

• Weight: 26.4 lb

Best for: Hands-on conversion project.

Why it ranks #1: Its stated 26–28-inch fit, 3L fuel tank, 415 heavy-duty chain, and 44-tooth sprocket provide useful compatibility and hardware details.

A 3L fuel tank and a 44-tooth sprocket give the IMAYCC kit its clearest practical distinction: buyers get a specified tank capacity and sprocket setup in a 100cc, two-stroke conversion package. It is listed for 26–28-inch bikes, with installation requiring basic hardware skills and tools.

The 415 heavy-duty chain and 44-tooth sprocket specify the drive components, helping buyers understand what the conversion package uses. Its 3L fuel tank gives a concrete capacity reference when planning rides and refueling. At 26.4 pounds, the kit adds considerable weight, and the installation notes estimate two to four hours for installation and fine-tuning. That makes this a more suitable project for someone prepared to handle mechanical setup than for a quick, tool-free conversion.

Skip it if you want installation without mechanical work; the instructions call for basic hardware skills, tools, and two to four hours of setup.

For a hands-on buyer converting a listed 26–28-inch bike, this kit offers defined tank and drive specifications. Allow time for installation and fine-tuning, and account for its 26.4-pound kit weight when choosing a bicycle.

Listed on Amazon as: IMAYCC Bike Motor Kit 100cc Motorized Bike Kit 2 Stroke Gas Bicycle Engine Conversion Kit Fit for 26-28" Bikes Black

#2 · Most Detailed Specs

2. YUNLAIGOTOP 100cc Kit

• Warranty Description: Free warranty within one year for…

Best for: Tunable carburetor setup.

Why it ranks #2: This 2-stroke kit lists a 44-tooth sprocket, tunable carburetor, CDI ignition, and a stated maximum speed of 48km/h.

A carburetor with a re-jettable main jet and adjustable idle controls is the YUNLAIGOTOP kit’s defining feature, giving hands-on owners several settings to work with. The 100cc, air-cooled, two-stroke package is listed for 26–28-inch bikes and includes a 44-tooth sprocket and upgraded CDI.

The carburetor’s re-jettable main jet, pilot jet, and idle adjustment screws provide multiple tuning points, while the handlebar choke lever puts choke operation within reach. Air cooling and CDI ignition are specified alongside a 1.9kW maximum power rating at 5,500rpm. The listing also gives a kick-start system and a maximum speed of 48km/h, useful details for buyers comparing operation and performance. Its stated compatibility is limited to 26–28-inch bikes.

Skip it if you want electric starting; this kit specifies kick starting, while the TANAUT EZ-156F lists recoil start.

Choose it if you want a 100cc conversion with carburetor tuning controls and a handlebar choke. The fit listed is for 26–28-inch bikes, and starting is by kick rather than an electric system.

Listed on Amazon as: 100cc Bicycle Engine Kit 2 Stroke Motorized Bicycle Engine Motor Kit Gas Bicycle Engine Conversion Kit with Air-Cooling, Bike Motor Kit Fit for 26"-28" Bikes

#3 · Largest Stated Tank

3. Mahugde 100cc Kit

• Warranty Description: 1

Best for: Large-tank 36-tooth setup.

Why it ranks #3: Its 0.53-gallon tank, 36-tooth sprocket, and stated fit for most 26- or 28-inch V-frame bikes make key details easy to assess.

A 0.53-gallon fuel tank is the Mahugde kit’s clearest draw for riders planning longer stretches between refueling. Its 100cc, two-stroke engine is paired with a 36-tooth sprocket and CDI ignition, and the listing specifies most 26- or 28-inch bicycles with V-shaped frames and large triangular openings.

The 0.53-gallon tank is listed alongside fuel consumption of about 0.66 gallons per 100km, giving buyers two figures to weigh when planning range and refueling. A 36-tooth sprocket and CDI ignition specify key conversion components. The fit guidance narrows the intended bicycles to most 26- or 28-inch models with V-shaped frames and large triangular empty frames. The kit also lists a 440-pound maximum load, a useful boundary for rider and cargo planning.

Skip it if you have a bicycle without a V-shaped frame and large triangular opening; the listed fit is for that frame layout.

For riders wanting a larger stated tank capacity and a 36-tooth setup, Mahugde offers clear component and fit details. Its frame-shape guidance matters: the listing specifies V-shaped frames with large triangular openings.

Listed on Amazon as: Upgraded Bicycle Engine Kit 100cc 2 Stroke Bike Motor, Air-Cooling Gas, Engine Motorized Bicycle Kit with CDI Ignition Mode and 36-Tooth Sprocket for Most 26"/28" Bikes Scooter

#4 · 36-Tooth Sprocket

4. CUBELLIN 100cc Kit

• Weight: 6.8 kg
• Warranty Description: 2 year warranty against manufacturer defects

Best for: 36-tooth efficiency focus.

Why it ranks #4: The 2-stroke kit specifies a 36-tooth sprocket, 26-inch wheel size, 440-pound maximum load, and included English manual.

A 36-tooth sprocket is the CUBELLIN kit’s distinguishing hardware detail, paired with a listed fuel-consumption figure of 150 miles per gallon. This 100cc, air-cooled, two-stroke package is also specified for a maximum load of 200kg, making its gearing and capacity central comparison points.

The 36-tooth sprocket gives the kit a defined gearing component, while the stated 150 miles per gallon provides a fuel-use figure for buyers comparing operating claims. Its 200kg maximum load is another concrete planning limit for rider and cargo. The package includes assembly accessories and an English manual, but assembly is required. The listing names a 26-inch wheel size, so buyers with another wheel size should treat that as an important fit consideration.

Skip it if you need a listed fit reference for a different wheel size; this product's specifications name a 26-inch wheel.

This kit suits buyers comparing a 36-tooth setup and the listed fuel-use figure for a 100cc conversion. Its specifications name a 26-inch wheel, so that detail is central when deciding whether it fits your bicycle.

Listed on Amazon as: 100cc Bicycle Engine Kit 2 Stroke Motorized Bike Motor Kit

#5 · 4-Stroke Power

5. FDTZBPXMC 4-Stroke Kit

• Weight: 42.3 lb
• Warranty Description: Manufacturer warranty available upon request

Best for: Four-stroke load capacity.

Why it ranks #5: This 100cc 4-stroke listing states 3.5HP, air cooling, and a 440-pound maximum load, though bicycle fit details are limited.

A stated 200kg maximum load sets the FDTZBPXMC kit apart for buyers prioritizing carrying capacity in a 100cc bicycle conversion. Its 3.5HP, air-cooled, single-cylinder four-stroke engine pairs that capacity claim with an aluminum shell, an iron fuel tank, and a side nylon cover.

The 3.5HP engine and stated 2kW rated power give buyers concrete output figures, while air cooling is described as helping reduce operating temperature during longer rides. Its listed 200kg maximum load provides a useful capacity boundary for planning rider and cargo weight. The 42.3-pound kit is supplied with an English manual and assembly accessories, so installation involves handling a substantial package and assembling components rather than simply attaching a finished motor.

Skip it if you need a lighter kit to handle during installation; this assembly weighs 42.3 pounds before fitting.

This is a fit for buyers who value the stated load capacity and a four-stroke engine for a bicycle conversion. Consider the 42.3-pound assembly weight and confirm that your bicycle suits the intended installation.

Listed on Amazon as: 100CC 4-Stroke Motorized Bicycle Engine Kit, 3.5HP Petrol Gas Motor Kit, Air-Cooling Single Cylinder Engine for Mountain Road Beach Bike

#6

6. AKSDSGA Belt-Drive Kit

• Weight: 41.3 lb

Best for: Belt-drive four-stroke kit.

Why it ranks #6: Its title identifies a 100cc 4-stroke bicycle motor with belt drive, while the listing gives a 3.5HP model designation.

A belt drive distinguishes this AKSDSGA 100cc four-stroke bicycle engine kit from the chain-drive configurations named elsewhere in this roundup. Its listing also identifies a 3.5HP, 44-teeth model designation, giving shoppers a concise set of details to consider when comparing conversion layouts.

The belt-drive designation identifies the transmission approach, a useful consideration for buyers who are specifically looking for a belt-driven conversion. The title identifies the engine as a 100cc four-stroke gas motor, while the model designation includes 44 teeth and 3.5HP. At 41.3 pounds, the kit is substantial to handle during installation. The supplied specifications do not establish bicycle fit or installation steps, so those details should be resolved before choosing this kit.

Skip it if you want a listing with stated bicycle-size compatibility; the supplied specifications identify no wheel-size fit for this kit.

Consider this kit if a belt-drive, four-stroke conversion is your priority and you can manage a 41.3-pound assembly. Its supplied details are limited, so establish bicycle compatibility and installation requirements before proceeding.

Listed on Amazon as: 100CC Bicycle Engine Kit 4 Stroke Gas Bike Motor Kit w/Belt Drive

#7

7. TANAUT 100cc 4-Stroke

• Weight: 44 lb
• Warranty Description: 1 year

Best for: Four-stroke commute conversion.

Why it ranks #7: The 4-stroke engine lists 2kW rated power, recoil start, a 1-year warranty, and 3600rpm maximum speed.

A 25-degree inclined OHV engine and recoil start define the TANAUT kit’s configuration for buyers comparing four-stroke bicycle conversions. The 100cc engine is rated at 2kW, and the listing describes the four-stroke design as quieter and more stable than a two-stroke engine.

The 25-degree inclined, single-cylinder OHV layout identifies the engine configuration, while recoil starting tells buyers how the engine is started. Its 2kW rated power and maximum speed of 3,600rpm provide stated operating figures. The maker also describes the four-stroke engine as quieter and more stable than a two-stroke. At 44 pounds, the included engine is a substantial component to position during a conversion, and the listing describes it as a bike-motorizing kit.

Skip it if you need a lighter engine to lift and position; this included TANAUT engine weighs 44 pounds.

This suits buyers seeking a recoil-start, four-stroke conversion for commuting or other bicycle rides. The engine weighs 44 pounds, and the supplied details do not specify bicycle size, so consider both points before choosing.

Listed on Amazon as: Bicycle Motor Kit 100cc 4-Stroke, Gasoline Engine Motor for Motorized Bicycle, OHV 25° Inclined Single-Cylinder, Recoil Start, 2KW Rated Power, Aluminum Iron Plastic Construction

#8

8. Fobuaggc 100cc Kit

Best for: Two-stroke break-in routine.

Why it ranks #8: This 2-stroke CDI kit is stated to fit most 26–28-inch bikes with V-shaped frames and gives separate break-in and later fuel ratios.

A specified fuel-to-oil mixture that changes after break-in gives the Fobuaggc kit a distinct operating requirement: 16:1 during break-in, then 20:1 afterward. This 100cc, air-cooled, two-stroke kit is listed for most 26–28-inch bicycles with V-shaped frames and large triangular openings.

The two different mixture ratios mean owners need to follow a break-in fueling routine before switching to the listed post-break-in ratio. The kit’s air-cooled, 100cc two-stroke engine is intended for most 26- or 28-inch bicycles with V-shaped frames and large triangular empty frames, including mountain, road, gravel, and beach bikes. The supplied guidance also emphasizes reading the manual and following precautions, so setup depends on careful attention to the operating instructions.

Skip it if you want to avoid managing different fuel mixtures; this kit specifies separate ratios for break-in and later use.

Choose this for a 26–28-inch V-frame bicycle if you can follow the stated mixture schedule and manual precautions. The change from 16:1 to 20:1 is a practical part of ownership.

Listed on Amazon as: 100CC Bicycle Engine Kit, 2 Stroke Benzin Bike, Engine Motor Kit CDI Air Cooling, for 26-28" Bikes

#9

9. eaizybuk 100cc Kit

• Weight: 24.4 lb

Best for: 44-tooth 26-inch setup.

Why it ranks #9: The listing identifies a 2-stroke engine, 0.53-gallon tank, 44-tooth sprocket, and stated compatibility with 26- or 28-inch bicycles.

A 44-tooth sprocket and a 0.53-gallon tank are the clearest specified details of this eaizybuk 100cc, two-stroke bicycle engine kit. Its title names compatibility with 26-inch or 28-inch bicycles, giving buyers a useful starting point when comparing wheel-size fit and fuel capacity.

The 44-tooth sprocket identifies the drive component, while the 0.53-gallon tank gives buyers a stated capacity for planning refueling. The product is described as a 100cc two-stroke kit with CDI ignition, so those are the key engine and ignition details available for comparison. At 24.4 pounds, its listed weight is relevant when handling the kit for installation. The title specifies 26- or 28-inch bicycles, which narrows the stated wheel-size fit.

Skip it if you need a listed fit for a wheel size other than 26 or 28 inches; the title names those two sizes.

This fits buyers comparing a 44-tooth, CDI-equipped conversion with a stated 0.53-gallon tank. The title names 26- and 28-inch bicycles; treat that wheel-size boundary as a key selection factor.

Listed on Amazon as: 100CC 2 Stroke Bike Motor Kit,0.53Gal Gas Bicycle Engine Kit with CDI Ignition,44 Teeth for 26-Inch or 28-Inch Bicycles

#10

10. OLKKEFT 100cc Kit

Best for: 44-tooth gas conversion.

Why it ranks #10: Its title confirms a 2-stroke 100cc bicycle engine kit and 44-tooth sprocket, but provides few further compatibility or component details.

A 44-tooth sprocket is the most specific hardware detail in the OLKKEFT listing, which identifies a 100cc, two-stroke gas motor kit for a motorized bicycle. Buyers comparing basic conversion configurations can use those named engine and sprocket details as their starting point.

The title identifies both a 100cc two-stroke engine and a 44-tooth sprocket, giving buyers two concrete specifications to compare when considering a gas-powered bicycle conversion. The listing also names the product as a motorized bicycle engine kit, clarifying its intended application. Because the supplied product details offer no further operating figures, this is best approached as a straightforward title-level comparison rather than a choice based on stated tank capacity, wheel-size fit, or installation information.

Skip it if you need a stated tank capacity for planning refueling; this listing identifies no capacity figure in the supplied details.

This is for buyers whose shortlist prioritizes a 100cc two-stroke gas motor and 44-tooth sprocket. If tank capacity, bicycle fit, or installation details will determine your choice, the supplied specifications do not resolve those points.

Listed on Amazon as: 100cc Gas Motorized Motor Bicycle Engine, 2-Stroke Gas Bike Motor kit with 44 Tooth Sprocket, Bicycle Engine Kit Petrol Gas Motor Engine Kit