Features: 49cc 4 stroke pull start petrol conversion kit for adult bicycles, ideal for bikes with 26 inch frames and similar Long term spares available as required. 4 stroke engines are more stable, more reliable and Quieter than the 2 stroke rivals. The top speed of between 27 - 32 MPH / or 43 - 51 KPH The tank holds 2 litres of petrol and everything comes with the kit. Note: · if your bike has one piece cranks you will need a European Bottom Bracket Adapter for the wide cranks to be installed. Package includes: · 1 x Quality 49cc 4 stroke engine · 1 x Gas tank,Plastic gasoline fuel line,fuel value · 1 x Adjustable chain idler · 1 x 44 tooth 9 hole sprocket · 1 x Chain guard · 1 x Extra wide crank/sprocket · 1 x Fiber sprocket mounting rings,9 sprocket bolts,3 metal retaining segments · 1 x Engine Mounting plate with universal mounting brackets · 1 x Spark Plug Wrench · 1 x Misc.mounting bolts with nuts · 1 x Heavy duty #415 chain · 1 x Twist grip throttle with built-in kill switch