7. CYLINDER HEAD/VALVES AGILITY 50 VALVE/ VALVE GUIDE Inspect each valve for bending, burning, scratches or abnormal stem wear. Check valve movement in the guide. Measure each valve stem O.D. Service Limits: IN : 4.9mm replace if below EX: 4.9mm replace if below CYLINDER HEAD ASSEMBLY Valve Spring Compressor · 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 Valve Spring Compressor Val ve Spring Compressor Attachment Valve Spring Compressor Attachment Tap the valve stems gently with a plastic hammer for 23 times to firmly seat the cotters. Be careful not to damage the valves. CYLINDER HEAD INSTALLATION Dowel Pins Gasket Install the dowel pins and a new cylinder head gasket. Install the cam chain guide. Cam Chain Guide 7-8