Daelim S4 50cc Service Manual - Mojo

CYLINDER HEAD / VALVES● Remove the valve spring compressor, valve spring,valve cotter, retainer, sparing and valve.VALVE SPRINGTOOL: VALVE SPRING COMPRESSORVALVE SPRINGCOMPRESSORNOTE•To prevent the loss of tension, do not compree thespring more than necessary.•Mark the disassembled parts so that they can bereassembled in to the original position.INSPECTION● Remove the carbon deposits from the inside ofcombustions chamber.● Check the spark plug assembling hole and the valveseat for cracks.● Using a square and a feeler gauge, check thecylinder head distortion.SERVICE LIMIT: 0.05 MMFEELER GAUGENOTE•Take precautions not to damage the cylinder headgasket attachment.AINNER VALVE SPRINGBOUTER VALVE SPRINGVALVE SPRINGINSPECTION● Measure the free length of the inner and outer valvesprings.FREE LENGTH : IN 30.5 MMEX 34.1MMNOTE•Replace the valve spring with new one if the lengthof any one is less than service limit.VALVEIN / EX VALVEINSPECTION● Inspection in/ex. valve stem for bent, seized,abnormal wear of step.● Insert the valves in their original positions in thecylinder head.● Measure and record the in/ex.valve stem outerdiameter.SERVICE LIMIT: IN 4.965EX 4.955