PNKKODW 80cc bicycle engine kit includes all the parts and instructions necessary to convert your bike,also include a speedometer. It is a bit technical, and will require some time to install, thus professional installation is highly recommended. Package Include 1x 80cc bicycle engine,1x Carburetor ,1x Ignition coil & CDI,1x Muffler,1x 415 Heavy duty chain, 1x Chain cover,1x Chain Tensioner, 1x 44T Sprocket W/ 9 Hole Clamp Pads,1x Fuel tank, 1x Fuel filter, 1x Gasoline fuel line,1x Gasoline tank switch, 2x Throttle handlebar, 1x Throttle cable, 1x Clutch cable,1x Clutch leverGift: 1x SpeedometerAll the needed mounting brackets, gaskets, and hardware Silver 80cc Bicycle Engine Kit Black 80cc Bicycle Engine Kit Add to Cart Add to Cart Customer Reviews 3.7 out of 5 stars 145 3.6 out of 5 stars 206 Price $105.99$105.99 $109.99$109.99 Color Silver Black How to connect the oil tank 80cc motorized bike kit Top Speed: 25-35 MPH (miles per hour) stock Fuel Economy: 100-150 miles per gallon Power: 5-6 HP (horse power) stock 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. How to connect the oil tank 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. Please Notes: 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. All our engine already fully assembled when arrived. In order to let our customer know more about our product, we take it apart and let cusotmer to know the truth inside. Package Our package already upgrade with foam safe package, and it can protect the engine and oil tank well during deliver process. The bicycle engine kit fits most 26" or 28" wheeled bikes (Mountain, Cruiser, Chopper, Road) with V-frame. A Speedometer as gift Our 80cc motorized bike kit comes with classic style analog speedometer, you can see your motorized bike's speed and control it well. To start, move the choke lever to "on" position, hold in clutch, pedal the bike fast to get some speed, and then release the clutch gradually. To stop, slow speed, disengage clutch and apply either original brake (if you didn't remove the original left handle brake). To stop the engine, choke the carburetor completely with the lever on the carburetor. Alternatively, slow speed, hold in clutch and press the kill switch on twist-grip throttle.