The Best Bicycle Engine Kit 4 Stroke of 2023

【Type】: Single cylinder, 4-stroke with air-cooled, and clutch operated by hand.

【Power】: Max Power: 6.5 kW/7500r/min±375r/min, Max Torque: 8.0 Nm/5000r/min±250r/min;Idle Speed: 1500r/min, Min Fuel Consumption: ≤370g/kw.h, Ignition System: CDI.

【High performance】: A high performance engine, perfect for those comfortable with faster engines and have a desire to get up and go; Wide range of applications, can be applied for bicycles, models, skateboards and so on. Excellent quality, great bike engine motor accessories.

【Gear Ratio】: Gear Ratio:2.833/1.706/1.238/0.958, Compression Ratio: 9.0:1, Primary Reduction;Ratio: 3.722, Carburetor Type:PZ16J,Transmission:4-speed, Manual clutch, 4 Up; Start Mode: Kick-starter.

【Fits】: HONDA CRF50 / CRF70 / XR50 / XR70 / Z50 / Z50R / CT70 Mini Trail / Z50 / Minitrail Monkey / XL70 ST70 / QA50 / QR50 / CL70 / SL70 / 70 Passport / ST 90K2 / ST 90K1 / CS 90 / SL 90 / ZB 50.

49cc 4 stroke pull start petrol conversion kit fits for normal 28” V frame bike and 26” ATV bike , both with 28-40mm frame tube. Note: Installation instruction not included.It is recommended to find a professional to install or refer to videos online by searching "49CC bike motor installation".

This 4 stroke bicycle engine kit is more stable, more reliable and Quieter than the 2 stroke rivals.

Mode of engine: single cylinder, air-cooling, 4-stroke; Compression ratio:8.0 : 1; Ignition System: Transistorized magneto ignition. Pls note: The switch has two cables (green and black) and the engine has one cabel (black), you can just connect the black to black and don' t need to connect the green cable.You can wrap it with a electrical tape.

4-stroke 49cc bike engine kit is perfect to upgrade the regular bike to a motorized bike,you can enhance the riding experience by accelerating the speed.

With powerful motor and 44 tooth 9 hole sprocket, this motor is with speed 27-32 MPH / or 43-51 KPH.With 41.8 x 36 mm bore stroke,49 cm3 displacement, oil tank capacity 2.5.

49cc 4 stroke pull start petrol conversion kit fits for normal 28” V frame bike and 26” ATV bike , both with 28-40mm frame tube. Note: Installation instruction not included.It is recommended to find a professional to install or refer to videos online by searching "49CC bike motor installation".

Mode of engine: single cylinder, air-cooling, 4-stroke; Compression ratio:8.0 : 1; Ignition System: Transistorized magneto ignition

With powerful motor and 44 tooth 9 hole sprocket, this motor is with speed 27-32 MPH / or 43-51 KPH

Key parameters: 41.8 x 36 mm bore stroke; 49 cm3 displacement; Oil Capacity: 0.25L; Fuel Tank Capacity: 0.77L

4-stroke 49cc engine kit is perfect to upgrade the regular bike to a motorized bike,you can enhance the riding experience by accelerating the speed

ELECTRIC START: The 66/80cc BBR Tuning Bullet Train Bike Engine Kit has an electric start that makes pedal-starting your engine a thing of the past. It also has a centrifugal clutch, making it simple to use the pull start to start your engine. Unlike other bicycle engines that require a clutch that needs constant maintenance, the Bullet Train has a centrifugal clutch that never needs to be disengaged. Just pull the pull rope or his the electric start, and in seconds you're ready to ride

HIGH PERFORMANCE: The Bullet Train is a 5hp (horse power) 66/80cc single cylinder air cooled electric start bike engine kit. It features high quality components to ensure a long life span with low maintenance. It can reach up to 30mph which makes it great for commuting around town.

RELIABLE: All of the BBR Tuning bike engines feature the latest upgrades, including Japanese crank bearings and clutch components. We make certain that all of our manufactures abide by strict quality control assurance measures and use the highest quality material so that we can make certain that all of our customers get only the best. Made for experienced riders and builders, our BBR Tuning Bullet Train engine kit is ready soar- are you?

EASY INSTALLATION: This kit makes installation a breeze, it includes the necessary components to install on most 26" wheel bikes (Mountain, Cruiser, Chopper, Road) with V styled frames. 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"). The rider only needs some basic hardware skills, tools, and around 2-3 hours for installation and fine tuning adjustments

INDUSTRY LEADING 6 MONTH WARRANTY: Backed by an industry leading 6 month manufacture warranty and lifetime support the BBR Tuning 66/80cc Engine Kit comes with the industries best support and a satisfaction guarantee

🏅High performance Speed car,Silver anti-corrosion coating, High performance CDI with Yamaha components, Improved magneto, High end allen bolts, Improved gas cap

🏅4 bolts attach the engine to your bike frame and this kit comes are 8mm vs the standard 6mm. That means the mounts are twice as strong and twice as secure.

🏅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!

🏅Low fuel consumption, 150 miles per gallon, very energy efficient and economical. Engine requires 8oz 2 Stroke oil per gallon of gas during Break In Period.

🏅Ship from US stock ! We have our own warehouse and a professional Customer Service Team to reply you within 24 hours. If you have any Questions, please feel free to contact us. We promise you that we will do our ultmost to solve it for you firstly.

As a engine factory manufacturers with 10 year experience, we strictly control the quality and test every items before shipping. All of our components are made of good quality material and high precision. We promise all our engine are with 12 month warranty.

Fits Most 26" & 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").

Power: 1.6Kw/6000r/min (3 horsepower/6000r/min) -Top Speed: 30000MPH (miles per hour) , Bore & Stroke 48 cm3

Fuel Economy: 100-150 miles per gallon,Ignition Mode CDI,Compression Ratio 6:01,Driving Ratio 18:01

Installation is a breeze! The rider only needs some basic hardware skills, tools, and around 2-3 hours for installation and fine tuning adjustments

49cc 4 stroke pull start conversion kit fits for normal 28” V frame bike and 26” ATV bike , both with 28-40mm frame tube

With powerful motor and 44 tooth 9 hole sprocket, this motor is with speed 27-32 MPH / or 43-51 KPH

Key parameters: 41.8 x 36 mm bore stroke; 49 cm3 displacement; Oil Capacity: 0.25L; Fuel Tank Capacity: 0.77L

Mode of engine: single cylinder, air-cooling, 4-stroke; Compression ratio:8.0 : 1; Ignition System: Transistorized magneto ignition

4-stroke 49cc engine kit is perfect to upgrade the regular bike to a motorized bike,you can enhance the riding experience by accelerating the speed

49cc 4 stroke pull start petrol conversion kit Replacement for normal 28” V frame bike and 26” ATV bike , both with 28-40mm frame tube.

Key parameters: 41.8 x 36 mm bore stroke; 49 cm3 displacement; Oil Capacity: 0.25L; Fuel Tank Capacity: 0.77L.

With powerful motor and 44 tooth 9 hole sprocket, this motor is with speed 27-32 MPH / or 43-51 KPH.

4-stroke 49cc engine kit is perfect to upgrade the regular bike to a motorized bike,you can enhance the riding experience by accelerating the speed.

Mode of engine: single cylinder, air-cooling, 4-stroke; Compression ratio:8.0 : 1; Ignition System: Transistorized magneto ignition.

This engine is a 4-stroke motor engine kits, includes everything a motor needs at a economic price

This 4-stroke motor is more stable, more reliable and Quieter than the 2 stroke rivals

With powerful motor and 44 tooth 9 hole sprocket, this motor is with speed 27-32 MPH / or 43-51 KPH

With 41.8 x 36 mm bore stroke,49 cm3 displacement, oil tank capacity 2.5L

Fits normal 28” V frame bike and 26” ATV bike , both with 28-40mm frame tube

Bicycle-Engines Black V-Frame Mounting Plate Kit 4-Stroke Mount Plate for 49cc

Brand new 4-stroke mount plate in black color that mostly apply on your favorite bike

Measurement of Bolt Hole where the engine mounts:6.5mm*26.5mm

Heavy duty industrial use 4-stroke mount plate; 4-stroke mount plate Compatible with 49cc;

This product Comes with 12months Warranty. Any questions,please contact us firstly! we can help you solve the problem until you are satisfied.