7. CYLINDER HEAD/VALVES FILLY LX 50 Valve Spring Compressor CYLINDER HEAD DISASSEMBLY Remove the valve spring cotters, retainers, springs, spring seats and valve stem seals using a valve spring compressor. · Be sure to compress the valve springs with a valve spring compressor. · Mark all disassembled parts to ensure correct reassembly. Special Valve Spring Compressor Valve Spring Compressor Attachment Valve Spring Compressor Attachment Remove carbon deposits from the combustion chamber. Clean off any gasket material from the cylinder head mating surface. Be careful not to damage the cylinder head mating surface. INSPECTION CYLINDER HEAD Check the spark plug hole and valve areas for cracks. Check the cylinder head for warpage with a straight edge and feeler gauge. Service Limit: 0.05mm repair or replace if over VALVE SPRING FREE LENGTH Measure the free length of the inner and outer valve springs. Service Limits: Inner : 30.1mm replace if below Outer : 33.3mm replace if below 7-7