6. CYLINDER HEAD/VALVES Pulsar CK 125 SERVICE INFORMATION ..................... 6-1 CYLINDER HEAD DISASSEMBLY ........6-5 TROUBLESHOOTING ............................ 6-3 VALVE/VALVE GUIDE............................6- 6 CYLINDER HEAD REMOVAL.............. 6-4 CYLINDER HEAD ASSEMBLY...............6- 6 ROCKER ARM SET REMOVAL............ 6-4 CYLINDER HEAD INSTALLATION .......6- 7 SERVICE INFORMATION GENERAL INSTRUCTIONS · The cylinder head can be serviced with the engine installed in the frame. · When assembling, apply molybdenum disulfide grease or engine oil to the valve guide movable parts, valve arm and camshaft sliding surfaces for initial lubrication. · The valve rocker arm is lubricated with engine oil through the cylinder head engine oil passages. Clean and unclog the oil passages before cylinder head assembly. · After disassembly, clean the removed parts and dry them with compressed air before inspection. · After removal, mark and arrange the removed parts in order. When assembling, install them in the reverse order of removal. SPECIFICATIONS Item Standard (mm) IN 0.060.1 Valve clearance (cold) EX 0.060.1 Compression pressure kg/cm 1115 Cylinder head warpage 0.05 IN 0.100.025 Rocker arm clearance EX 0.100.025 Rocker arm-to-shaft IN 0.0130.046 clearance EX 0.0130.046 IN 89°90° Valve seat angle EX 89°90° IN 5.455.465 Valve stem O.D. EX 5.435.445 IN 5.4755.485 Valve guide I.D. EX 5.4755.485 Valve stem-to-guide IN 0.010.035 clearance EX 0.030.055 6-1