10 Best 2 Stroke Bicycle Engine of October 2025

• 🚴 80cc Bicycle Engine Kit,Engine Type: Single cylinder,air-cooled,2-stroke.For screw and bolts easily broken, we have upgraded premium quality hex socket screw and bolts to improve the performance.
• 🚴 Motorized bike kit,Power: 5-6 HP (horse power) stock -Top Speed: 25-35 MPH (miles per hour) stock - Fuel Economy: 100-150 miles per gallon
• 🚴 Fuel Type:Gasoline 93#;Mixing Ratio of Fuel and engine Oil: 16:1 for new sets breaking time, 25:1 after running 300KM;Please use premium quality oils to prolong engine life. And add some lubricant into the air cylinder before starting.
• 🚴 Bonus Speedometer as gift,Fits Most 26" Wheeled Bikes (Mountain, Cruiser, Chopper, Road) with V-frame. The frame should have 9-11" of clearance between the bottom bracket and top bar, and the diameter of the frame tubes should be 25-29mm (around an 1").
• 🚴 Notes:The rider needs basic hardware skills, tools, and around 2-3 hours for installation and fine tuning adjustments. If you do not have experience or the first time on installing the motor kit, before installing, please kindly read our instruction and search "80cc bicycle engine kit" on youtube, it will give a big help and troubleshoot a lot of issues during installation process.

Seeutek

• Any questions,please contact us firstly! We can help you solve the problem until you are satisfied.DONSP1986 UNASSEMBLED 2 Stroke Gas Bicycle Engine kit PK80 66cc/80cc; Bore and Stroke 47mmx40mm;
• Unassembled motor that cylinder and the complete lower end assemblies/Bottom End Body are SEPARATE;.buyers have to assemble cylinder to the bottom end body by themself;
• High hole Piston and Long connecting rod;Wide front mount; 8mm bolts to front and rear mount;Allen bolts on motor;Slant head; 40mm alum intake stud spacing; 36T sprocket;
• Clear up the cylinder transfer ports before assembling maybe some rough slag inside which maybe break off and cause the jamming of pistons and cylinders;fully attention on screwing cylinder to the end bottom,DO NOT screw M8 bolts tightly that maybe cause drill through the end bottom so add some gasket or washer on head is better way to prevent it happen; Attention on piston ring if put the piston out of cylinder, the piston rings are weak, better with right way install piston kit to cylinder
• Excluding :Bevel Gear Remover Tool,Manual and Universal Mount as well.

DONSP1986

• MOTOOS 2-stroke 80cc engine kit is perfect to upgrade the regular bike to a motorized bike,you can enjoying riding at a faster speed, which can reach 38km/h as fast as a motorcycle or scooter
• Fits for most 24" 26" or 28' wheeled bikes with V-frame. The frame should have 9-11" of clearance between the bottom bracket and top bar, and the diameter of the frame tubes should be 25-29mm (around an 1")
• Key parameters: bore and stroke-47mm & 40mm, Max. power 3 horsepower/5000r/min, Super fuel-efficient, only consuming 2.5L fuel/100km
• Lubrication Oil: oil for 2-stroke petrol engine (or oil for 10W/40.10W/30); Mixing Ratio of Fuel and engine Oil: 16:1 for new sets, 20: 1 after running 500km
• Mode of Engine: Single cylinder, air-cooling, 2-stroke Natural air cooling; The rider needs some basic hardware tools, skills and around 2-3 hours to install. Add some lubricant into the air cylinder before starting

MOTOOS

• 【80cc Petrol Gas Engine Kit 】-This 80cc petrol gas engine kit is used to upgrade the regular bike to a motorized bike. After converting your bike, you can enjoying riding at a faster speed, which can reach 38km/h. It almost runs as fast as a motorcycle or scooter, making your outdoor trip more convenient.
• 【Features】-1. A complete engine kit for converting your bike. 2. Heavy duty metal engine body for added durability. 3. Super fuel-efficient, only consuming 2.5 litre fuel per 100km. 4. Fast and smooth, can speed up to 38km/h. 5. Comes with all needed hardware for easy installation. 6. Fit for most type 26" and 28" bikes, such as mountain bikes, road bikes,cruisers, choppers.
• 【Package included】- 1x 80cc 2-stroke engine, 1x Carburetor, 1x Ignition coil & CDI, 1x Throttle handlebar set, 1x Throttle cable, 1x Clutch cable, 1x Kill switch, 1x Clutch lever, 1x Chain, 1x Chain cover, 1x 44T Sprocket W/ 9 Hole Clamp Pads, 1x Chain Tensioner, 1x Fuel tank, Fuel filter, 1x Gasoline fuel line, 1x Petcock, 1x Muffler, All the needed mounting brackets, gaskets, and hardware
• 【Note】- Please also keep in mind that the motor will use a mix of gasoline and oil. The oil is used as a lubricant. Without it, the performance and longevity of the motor will be reduced, be assured the mixing ratio of fuel and engine oil is 16:1 for new sets, 20:1(18:1 is much better in summer because of the hot weather) after running 500km.
• 【After-sales & Shipping】- Serving customers is our philosophy,you have received the goods and our service has just begun, We try to make sure you have a pleasant shopping experience with us, Our goods are shipped from US, Usually in 5-7 days(Special Situation, We will contact the customer in advance).

Dasuy

• ✪3.Fast and smooth, can speed up to 38km/h. Comes with all needed hardware for easy installation.
• ✪4.Fit for most type 26" and 28" bikes, such as mountain bikes, road bikes,cruisers, choppers.
• ✪5.This 80cc petrol gas engine kit is used to upgrade the regular bike to a motorized bike. After converting your bike, you can enjoying riding at a faster speed, which can reach 38km/h.
• ✪6.It almost runs as fast as a motorcycle or scooter, making your outdoor trip more convenient. This engine kit fits most 26" or 28" bikes with V-frame.
• ✪7.If you are not satisfied with this product or if you have any question, please feel free to contact us. We would like to issue full refund if finally we could not resolve your problem or you are not satisfied with the result. 1.Go to your amazon account and find the order. 2.Click the seller name and enter the store page. 3.Click "Ask a question".

Sihand

• MOTOOS 2-stroke 80cc engine kit is perfect to upgrade the regular bike to a motorized bike,you can enjoying riding at a faster speed, which can reach 38km/h as fast as a motorcycle or scooter
• Fits for most 24" 26" or 28' wheeled bikes with V-frame. The frame should have 9-11" of clearance between the bottom bracket and top bar, and the diameter of the frame tubes should be 25-29mm (around an 1")
• Key parameters: bore and stroke-47mm & 40mm, Max. power 3 horsepower/5000r/min, Super fuel-efficient, only consuming 2.5L fuel/100km
• Lubrication Oil: oil for 2-stroke petrol engine (or oil for 10W/40.10W/30); Mixing Ratio of Fuel and engine Oil: 16:1 for new sets, 20: 1 after running 500km
• Mode of Engine: Single cylinder, air-cooling, 2-stroke Natural air cooling; The rider needs some basic hardware tools, skills and around 2-3 hours to install. Add some lubricant into the air cylinder before starting. NOTE: Due to the chemical reaction of electrophoresis, the engine motor of the product will have a certain proportion of color difference. Please mind to buy it carefully

MOTOOS

• A complete engine kit for converting your bike, 2-stroke 80cc engine kit is perfect to upgrade the regular bike to a motorized bike,you can enjoying riding at a faster speed, which can reach 38km/h as fast as a motorcycle or scooter.
• IE47FA 80cc Bike Refit Engine Riding Assistant: Fits Most 24" 26" or 28" Wheeled Bikes (Mountain, Cruiser, Chopper, Road) with V-frame. The frame should have 9-11" of clearance between the bottom bracket and top bar, and the diameter of the frame tubes should be 25-29mm (around an 1")
• Gas tank can hold 2L of OIL, Super fuel-efficient, only consuming 2.5 litre fuel per 100km. Model of Chain: 415, Chain Length: 110 links. You will be able to stop or start the engine as you ride
• Engine Mode: Single Cylinder, Air-cooling, 2-stroke. Mixing Ratio of Fuel and Engine Oil: 16:1 for Break Period(First 300 Miles), 25: 1 after
• It comes with fuel tank, silencer, electronic igniter and other accessories for convenient operation. All these gadgets are ensured for high quality and reliability. It is quite easy to refit your bicycle. Take action here!

• ✪1). This bike engine kit includes all of the necessary items to turn your pedal bicycle into a motorized speed demon with easy to follow instructions and phone support if needed.
• ✪2). 50mm bore single piece cylinder/head (increased weight capacity, lower operating temps, easier starting, sustained power output across varied rpm range).
• ✪3). Upgraded Tunable High Performance Carburetor. Features: Choke lever on the handlebars, Main jet. (Can be re-jetted), Pilot jet, Throttle needle, Idle RPM Screw, Idle Air Screw and has an Internal choke circuit that delivers more fuel with the choke on, instead of restricting air. Great for cold weather starts!
• ✪4). Offset Intake for additional clearance.50mm bore single piece cylinder, an upgraded CDI, Performance Speed Carburetor and more. High performance Speed carb, Silver anti-corrosion coating, High performance CDI with Yamaha components, Improved magneto, High end allen bolts, Improved gas cap.
• ✪5). If you are not satisfied with this product or if you have any question, please feel free to contact us. We would like to issue full refund if finally we could not resolve your problem or you are not satisfied with the result. 1.Go to your amazon account and find the order. 2.Click the seller name and enter the store page. 3.Click "Ask a question".

Sihand

• Fit on OD 38mm diameter downtube of bike frame ONLY; 56.5mm MAX length between the two oblong holes of pedestal(check the last two pictures); Length of Pedestal: 60.5mm
• Compatible with engine front mounth 33mm Approx;if your engine front mounth is 41mm approx, you have to Drill the holes on pedestal to be wider by yourself; check the Third and fourth picture for reference.
• Compatible with 1.5" to 2" stud spacing and suitable for front mount bolt 6mm and 8mm; For 66cc/80cc and 48cc 2-stroke bicycle engines Universal Mount for Bike Motors
• Works on most newer bicycles and allows you to mount the motor without drilling through the frame.
• Anodized/Fully cnc machine made/Alum Design; This product Comes with 12months Warranty. Any questions,please contact us firstly !we can help you solve the problem until you are satisfied.

CDHPOWER

• This Is Our Black 80CC 2-Stroke Bicycle Cycle Gasoline Engine Motor Bike, Which Is Ideal for motorized bicycle.
• The bicycle gasoline engine can greatly get the bicycle speed up to 50km/h, and it will surely be your excellent helper.
• It fits most 26/28 bikes only if the diameter of the fork is within 31mm.
• This bike motor kit comes with everything that you will need, except gas and oil.
• You will be able to stop or start the engine as you ride. High quality with competitive price can be realized here!

ExGizmo