Features:

•  100% brand new, not installed, high quality.
•  A complete engine kit for retrofitting bicycles.
•  Heavy-duty metal engine body increases durability.
•  Super fuel-efficient, enlarged cylinder head is good for heat dissipation.
•  Fast and stable, the speed can reach 55km/h.
•  Comes with all necessary hardware, easy to install.

Specification:

• Material: aluminum and iron
• Color: Black
• Engine mode: 100CC, single cylinder, air-cooled, two-stroke
• Cylinder: split cylinder
• Bore & Stroke: 49mm and 40.2mm
• Rated power: 3Kw / 5000r / min (4 horsepower / 5000r / min)
• Maximum power: 3.8Kw / 6000r / min (5.5-6.5 horsepower / 6000r / min)
• Ignition method: CDI
• Chain Model: 415
• Chain length: 110 links
• Compression ratio: 6:01
• Transmission ratio: 18: 01
• Fuel type: No. 90
• Fuel tank capacity: 2L
• Speed limit: 50km / hour
• Lubricant: Two-stroke gasoline engine oil (or 10W / 40.10W / 30 oil)
• Fuel and oil mixing ratio: 16:1 for the new unit, 20:1 after 500km
• Spark plug type: Z4C 14MM
• Fuel consumption: 3L/100km
• Clutch type: friction plate/dry
• Cooling method: natural air cooling

Applicable models: 

• Suitable for most 26" and 28" types of bicycles
• Inlet Manifold Inner Diameter of Central Hole: 14.7 mm / 0.58 inches
• Inlet Manifold Overall Length: 57.65 mm / 2.27 inches
• Inlet Manifold Overall Width: 54.8 mm / 2.16 inches
• Inlet Manifold Outer Diameter: 19 mm / 0.75 inches
• Exhaust Outlet Inner Diameter: 21 mm / 0.83 inches

Package Included:

•  1*Black engine box
•  1*black fuel tank
•  1*Flame switch
•  1*Carburettor
•  1*chain
•  1*Throttle cable
•  1*Clutch line
•  1*Tooth
•  1*Clutch handle
•  1*Throttle handle
•  1*chain cover
•  1*Black exhaust pipe
•  1*CDI igniter
•  1*fuel tank cap
•  1*oil filter
•  1*Spark plug
•  1*Oil switch
•  1*Tubing
•  2*Wallet
•  3*Clip
•  1*screw top
•  1*Exhaust pipe hoist
•  1*Spark plug tool
•  1*Clutch big spring
•  1*clutch small spring
•  1*Instruction
•  Some mounting screws