8. CYLINDER/PISTON ATV 150/125 PISTON INSTALLATION Remove any gasket material from the crankcase surface. Be careful not to drop foreign matters into the crankcase. Install the piston, piston pin and a new Piston piston pin clip. · Position the piston "IN" mark on the intake valve side. · Place a clean shop towel in the crankcase to keep the piston pin clip from falling into the crankcase. Piston Pin Clip Piston Pin CYLINDER INSTALLATION Cylinder Install the dowel pins and a new cylinder gasket on the crankcase. Coat the cylinder bore, piston and piston rings with clean engine oil. Carefully lower the cylinder over the piston by compressing the piston rings. · Be careful not to damage or break the piston rings. · Stagger the ring end gaps at 120° to the piston pin. Gasket Install the cam chain tension. Tighten the cam chain tension bolts. Bolts 8-9