8. CYLINDER/PISTON Mongoose/KXR 90/50 Cylinder Gasket "IN" Mark Install a new cylinder gasket on the mating surface between the cylinder and crankcase. Position the piston "IN" mark on the intake valve side. Make sure that the ring end gaps are aligned Ring Pins with the piston ring pins in the ring grooves. Lubricate the cylinder inside and piston rings with engine oil and install the piston into the cylinder while compressing the piston rings. Be careful not to damage the piston. Install the cylinder head. Torque: 0.81.2kg-m The installation sequence is the reverse of removal . 8-17