6. CYLINDER HEAD/VALVES ZING II 125 CYLINDER HEAD ASSEMBLY Install the valve spring seats and valve stem seals. Be sure to install new valve stem seals. Apply engine oil to the inside of the valve stem seals and insert the valves into the valve guides. Install the valve springs and retainers. Compress the valve springs using the valve spring compressor, then install the valve cotters. · When assembling, a valve spring compressor must be used. · Install the cotters with the pointed ends facing down from the upper side of the cylinder head. Special Tool Valve Spring Compressor Valve Spring Compressor E040 Plastic Hammer Tap the valve stems gently with a plastic hammer to firmly seat the cotters. Be careful not to damage the valves. Cylinder Head Dowel Pins CYLINDER HEAD INSTALLATION Install the cam chain guide. Install the dowel pins and a new cylinder head gasket. Cam Chain Guide Gasket 6-9