Best Motorized Bicycle Engine: Compare 10 Conversion Kits

#1 · Best Overall

1. IMAYCC 80cc Bike Motor Kit

• Weight: 11.14 kg
• Warranty Description: One Year Warranty

Best for: Hands-on 80cc installation.

Why it ranks #1: The 80cc two-stroke kit is listed for 26–28-inch bikes and specifies a one-year warranty, 2.5L tank, and 415 heavy-duty chain.

IMAYCC gives buyers an unusually explicit installation estimate: about 2 to 4 hours for fitting and fine-tuning, with basic hardware skills and tools required. Its 80cc two-stroke kit is listed for 26- to 28-inch bikes, helping DIY riders assess both the project workload and the stated fit range.

The installation guidance matters as much as the engine specification here: IMAYCC calls for basic hardware skills and tools, and advises first-time installers to consult its instructions and a named setup video. That preparation can help structure a hands-on conversion rather than treating it as a quick accessory fit. The 80cc two-stroke kit is listed for 26- to 28-inch bikes, and its 2.5-liter fuel tank supplies a capacity reference for use planning.

Skip it if you want a conversion that avoids hands-on installation; this kit calls for tools, basic hardware skills, and fine-tuning.

For a DIY rider with basic hardware skills, IMAYCC offers a stated installation estimate, guidance for first-time fitters, and a 26- to 28-inch fit range. Allow time for the listed installation and fine-tuning work.

Listed on Amazon as: IMAYCC Bike Motor Kit 80cc Motorized Bike Kit 2 Stroke Gas Bicycle Engine Conversion Kit Fit for 26-28" Bikes Black

#2

2. YUNLAIGOTOP 100cc Engine Kit

• Warranty Description: Free warranty within one year for…

Best for: Tunable 100cc conversion kit.

Why it ranks #2: This 100cc kit lists a 44-tooth sprocket, upgraded CDI, tunable carburetor, and fit for 26–28-inch bikes.

A tunable carburetor with adjustable jets and idle screws gives this YUNLAIGOTOP 100cc kit a way to tailor engine operation after installation. Its full conversion package includes a 44-tooth sprocket and upgraded CDI, letting owners of compatible 26- to 28-inch bikes work from a kit supplied with conversion components.

Air cooling and CDI ignition define the engine setup, while the supplied upgraded carburetor offers a choke lever at the handlebars, a re-jettable main jet, and idle adjustments. Those controls provide adjustment points for tuning rather than a fixed carburetor setup. The kit lists a 1.9 kW maximum power at 5,500 rpm and kick starting, so buyers should account for starting by kick and the listed two-stroke machine-oil lubrication when planning regular use.

Skip it if you need electric starting; the listed engine starts by kick, so it does not offer that starting method.

For a rider converting a 26- to 28-inch bicycle who wants carburetor adjustment options, the YUNLAIGOTOP kit combines useful tuning controls with conversion hardware. Its kick start and two-stroke oil requirements are relevant operating boundaries.

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 · Best Stated Power

3. H-YEEU 110cc Engine Kit

• Weight: 25.9 lb
• Warranty Description: /

Best for: High-output 110cc conversion.

Why it ranks #3: Its 110cc two-stroke listing states rated power of 3.5kW at 5000rpm and fit for most 26- and 28-inch bicycles.

H-YEEU lists a maximum power figure of 3.8 kW at 6,000 rpm for this 110cc two-stroke kit, making its stated output the key differentiator. The kit is listed for most 26- and 28-inch bicycles, including mountain bikes, road bikes, and cruisers, with a claimed 150 miles per gallon.

A single-cylinder, air-cooled two-stroke engine and the stated 3.5 kW rated power at 5,000 rpm give buyers both an engine configuration and a separate rated-output reference. The 26- to 28-inch bicycle fit claim covers several common bicycle types, supporting conversion planning across the listed categories. H-YEEU also cites 150 miles per gallon, but specifies gasoline mixed with two-stroke oil, so owners should account for preparing the fuel mixture during operation.

Skip it if you want to use gasoline without mixing in two-stroke oil; this H-YEEU engine specifies a mixed fuel.

For a rider considering a 110cc conversion across a listed 26- or 28-inch mountain bike, road bike, or cruiser, H-YEEU offers stated power and fuel-use figures. The two-stroke gasoline-and-oil mixture is an important ownership requirement.

Listed on Amazon as: 110cc 2-Stroke Bicycle Gasoline Engine Motor Kit Motorized (Sliver)

#4 · Best Four-Stroke Option

4. AKSDSGA 100cc Four-Stroke Kit

• Weight: 42.3 lb
• Warranty Description: 1-year warranty against manufacturer's defects

Best for: Hand-start four-stroke option.

Why it ranks #4: Unlike the other listed two-stroke kits, this 100cc option is a four-stroke with air cooling and a stated one-year defect warranty.

A hand-start four-stroke engine distinguishes this AKSDSGA 100cc kit from the two-stroke options in this roundup, giving conversion shoppers a different engine configuration to consider. The listing identifies air cooling and a chain drive, with the kit presented for road bikes and mountain bikes as well as motorized bicycle projects.

The single-cylinder 100cc engine is specified as four-stroke and air-cooled, while the chain drive describes how power is transmitted to the bicycle. Hand starting is stated in the product title, so buyers can account for that starting method before installation. At 42.3 pounds, this complete kit adds substantial listed weight to the build; planning the bicycle setup and the handling involved in fitting the engine matters before beginning the conversion.

Skip it if you want a lighter engine kit; this complete AKSDSGA kit is listed at 42.3 pounds.

For a builder specifically seeking a 100cc four-stroke, air-cooled bicycle engine with hand starting and chain drive, this AKSDSGA kit supplies those stated traits. Its 42.3-pound weight is a key consideration for installation and handling.

Listed on Amazon as: 100CC Bicycle Engine Kit 4 Stroke Bicycle Gasoline Engine Motor Complete Hand Start Motorized Bike Kit with Chain Drive and Air-Cooled, Bike Motor Kits for Road Bikes Mountain Bikes

#5

5. JAYGOVAN 80cc Engine Kit

Best for: 80cc fuel-conscious riding.

Why it ranks #5: The 80cc two-stroke listing gives concrete output and speed claims of 2.58 hp and up to 23.61 mph, plus CDI ignition.

JAYGOVAN’s stated fuel-use reference—about 0.53 gallons per 62.14 miles—gives this 80cc kit a clear angle for riders weighing expected fuel consumption. Its 2.1 kW output and listed top speed of 23.61 mph frame the performance side of the conversion, while CDI ignition is also specified.

The 80cc, two-stroke kit pairs a stated 2.1 kW output with a maximum speed claim of 23.61 mph, giving buyers a concrete performance reference for everyday routes. JAYGOVAN also lists approximately 0.53 gallons per 62.14 miles as a fuel-use reference, which helps riders consider range between refueling stops. CDI ignition is specified, but the supplied facts do not provide a frame-size fit range, so bicycle compatibility needs careful evaluation before purchase.

Skip it if you need a listed top speed above 23.61 mph; this JAYGOVAN kit states that figure as its maximum.

For riders considering an 80cc conversion with stated fuel-use and speed figures, JAYGOVAN’s kit supplies useful operating references. Treat 23.61 mph as its listed speed ceiling, and assess bicycle compatibility because no frame-size range is provided.

Listed on Amazon as: 80cc Bicycle Engine Kit 2 Stroke Gas Bike Motor Kit Refit Full Set

#6

6. Mahugde 110cc Engine Kit

Best for: V-frame 110cc DIY conversion.

Why it ranks #6: This 110cc air-cooled two-stroke kit specifies CDI ignition, a 2L tank, and a stated maximum power of 3kW at 6000rpm.

Its stated compatibility with most V-shaped frames and ample triangular space gives the Mahugde 110cc kit a specific bicycle-fit focus. The two-stroke, air-cooled engine uses CDI ignition and foot-pedal starting, making its frame requirements and starting method important details for DIY builders to consider.

Mahugde specifies a 3 kW maximum power at 6,000 rpm and a 16.4:1 total transmission ratio, giving buyers performance and gearing references for a conversion. The 2-liter fuel tank provides a stated capacity to consider when planning rides and refueling. Its fit guidance calls for most V-shaped frames with ample triangular space, so the frame area is a practical installation constraint; foot-pedal starting also shapes the operating routine.

Skip it if you need electric starting; Mahugde specifies foot-pedal starting for this engine kit.

For a DIY rider with a V-shaped bicycle frame and sufficient triangular space, Mahugde combines a 110cc engine, CDI ignition, and a 2-liter tank. Check that frame-space requirement and consider whether foot-pedal starting suits your routine.

Listed on Amazon as: Upgraded 110cc Bicycle Engine Kit, 2-Stroke Gas Motorized Bicycle Conversion Kit for 26" /28" Bikes Fit Petrol Gas Motor Kit Engine Refit Full Set with CDI for DIY Motorized Bicycle Bike (Black)

#7

7. Tipyoumall 110cc Engine Kit

• Weight: 11 kg
• Warranty Description: 2

Best for: Fuel-efficiency focused 110cc kit.

Why it ranks #7: The 110cc kit lists a 36-tooth sprocket, aluminum frame material, and a claimed 150 miles per gallon, though compatibility details are limited.

The claimed 150 miles per gallon is the defining figure for Tipyoumall’s 110cc bicycle engine kit, making fuel use a central consideration for riders planning frequent trips. The package is listed for 26- to 28-inch bikes and includes a tool kit, while its 36-tooth sprocket adds a specific drivetrain component.

Tipyoumall lists a 110cc two-stroke setup and a 36-tooth sprocket, giving buyers concrete engine and drivetrain details to consider for a conversion. Its stated fuel economy of 150 miles per gallon may appeal to riders focused on fuel use, although the listing also specifies an oil mixture during break-in: 8 ounces of two-stroke oil per gallon of gas. The 11 kg item weight is worth factoring into handling and installation planning.

Skip it if you want to avoid a specified oil mixture during break-in; this kit calls for 8 ounces per gallon of gas.

For a rider seeking a 110cc conversion and prioritizing the listed fuel-economy figure, Tipyoumall supplies a defined sprocket and tool kit. Keep the break-in oil mixture and 11 kg item weight in mind when planning installation and use.

Listed on Amazon as: 110cc Bicycle Engine Kit, Updated 2 Stroke Motorized Bike Engine Motor Kit for 26"- 28" Bikes Bicycles Petrol Gas Powered Super Fuel-efficient Fit Modified Full Set

#8

8. Bikerid 80cc Engine Kit

Best for: Speedometer-equipped 80cc kit.

Why it ranks #8: This 80cc two-stroke kit fits most 26- to 28-inch bicycles and includes a speedometer, with a stated maximum speed of 38km/h.

A speedometer included with the 80cc engine kit gives Bikerid’s conversion a useful speed-monitoring component alongside its stated maximum of 38 km/h. The kit is listed for most 26- to 28-inch bicycles and highlights high torque for hills, errands, commuting, and weekend rides, offering a clear use-case range.

The included speedometer gives the rider a way to monitor speed while using the stated maximum of 38 km/h as a performance reference. Bikerid also describes the 80cc two-stroke engine as providing high torque to support hill climbing, which is relevant for routes with inclines. Its 26- to 28-inch fit claim lets owners of bicycles in that size range consider reusing their current bike without major frame modifications, according to the listing.

Skip it if you need a listed maximum speed above 38 km/h; Bikerid states 38 km/h for this kit.

For a rider converting a 26- to 28-inch bicycle for errands, commuting, or weekend rides, Bikerid pairs an included speedometer with a stated hill-climbing torque benefit. Its listed maximum speed is 38 km/h, a useful boundary to consider.

Listed on Amazon as: 80cc 2 Stroke Bicycle Engine Kit, Gas Motorized Bicycle Conversion Kit with Speedometer, Fits 26" – 28" Bikes

#9

9. Tiozuiu 110cc Engine Kit

• Weight: 24.7 lb

Best for: CDI-equipped 110cc conversion.

Why it ranks #9: The 110cc two-stroke listing specifies air cooling and CDI, but provides fewer verifiable fit, warranty, and engine output details.

Tiozuiu specifies a 110cc two-stroke engine reaching 6,000 rpm, giving this kit a concrete operating figure for riders converting a bicycle for commuting or short trips. The listing also identifies air cooling and a CDI system, while its title states fit for 26- or 28-inch bikes.

The air-cooled engine and CDI system are named components of this 110cc conversion, giving buyers a defined engine and ignition configuration to plan around. Its stated 6,000 rpm figure provides an operating reference for the commute and short-trip use described in the listing. The title specifies 26- or 28-inch bikes, which narrows the stated fit range for bicycle selection. The 24.7-pound item weight is also relevant when considering installation and the added load on a bicycle.

Skip it if you need a kit with a listed weight below 24.7 pounds; Tiozuiu specifies that item weight.

For a rider converting a listed 26- or 28-inch bicycle for commuting or short trips, Tiozuiu combines a 110cc engine, air cooling, and CDI. Consider the 24.7-pound item weight when planning installation and bicycle handling.

Listed on Amazon as: 110CC Bicycle Engine Kit, 2-Stroke Gas Motorized Bicycle Conversion Kit, Gas Powered Engine Motor Kit with Air Cooling and CDI System,Gas Bike Bicycle Motor Engine Kit Fit for 26"or 28" Bikes, Black

#10

10. Ubnffsv 100cc Engine Kit

Best for: Longer-range tank capacity.

Why it ranks #10: This 100cc two-stroke kit lists a 36-tooth sprocket and 0.53-gallon tank, but gives less specific bicycle-fit and warranty information.

A stated 0.53-gallon fuel tank is the Ubnffsv kit’s defining range-oriented detail, with the listing connecting that capacity to longer journeys between refueling. This 100cc two-stroke conversion also specifies CDI ignition and a 36-tooth sprocket, and is listed for most 26- and 28-inch bikes.

The 0.53-gallon tank gives riders a clear capacity figure for planning trips, while the listing estimates fuel consumption at around 0.66 gallons per 100 kilometers. That consumption figure qualifies the longer-journey claim and helps buyers consider refueling needs together with tank size. A 36-tooth sprocket and CDI ignition are also specified, and the kit is listed for most 26- and 28-inch bikes, supporting conversion planning around those stated components and sizes.

Skip it if you need lower stated fuel consumption; Ubnffsv lists around 0.66 gallons per 100 kilometers.

For a rider planning longer outings on a listed 26- or 28-inch bicycle, Ubnffsv pairs a 0.53-gallon tank with CDI ignition and a 36-tooth sprocket. Weigh tank capacity against the stated fuel-consumption figure when planning trips.

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