6. CYLINDER HEAD/VALVES K-PIPE 125 CYLINDER HEAD DISASSEMBLY Remove the two bolts and the right side cover. Screw a 8mm bolt into the rocker arm shaft, and pull it out of the cylinder head. Remove the rock arms and camshaft from the cylinder head. Valve Spring Compressor A120E00051 While compressing the valve spring with a Valve spring compressor, remove the valve Right side cover Bolts cotters. Rocker Arm Loosen the valve spring compressor and remove the valve retainer, valve springs, spring seats, stem seals and valves. To prevent loss of tension, do not compress the valve spring more than necessary to remove the valve spring cotters. Mark all parts to insure original assembly. Remove carbon deposit from the combustion chamber. Clean any gasket material from the cylinder head mating surface. Be careful not to damage the cylinder head mating surface and valve seat. 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 spring : 33.5mm Outer spring : 40.9mm 6-5