The Malossi Sport 70 is a high-torque cylinder kit with robust cast iron piston, 2 piston rings. It is easy to tune and bring even with stock carb and exhaust very good performance. Optimum cylinder sports for daily use. The cylinder kit comes with all necessary hardware, gasket kit, installation instructions, etc. and is very well made. Comes with cylinder head. Use a spark plug for that cylinder head with short thread.