Yamaha Motor Co., Ltd. YFM7FGPW — VALVES AND VALVE SPRINGS

h. Press the valve through the valve guide and onto the valve seat to make a clear pattern. i. Measure the valve seat width again. If the valve seat width is out of specification, reface and relap the valve seat. LLL L L LLL L L LLL L L LLL L L LLL L L LLL L LLL 10.Measure: valve spring free length a Out of specification Replace. Valve spring free length 38.79 mm (1.53 in) : 36.85 mm (1.45 in) 11.Measure: compressed spring force a Out of specification Replace. b Installed length Compressed spring force 169.0 ~ 199.0 N at 35.00 mm (17.23 ~ 20.29 kg at 35.00 mm, 37.99 ~ 44.73 lb at 1.38 in) 12.Measure: spring tilt a Out of specification Replace.

EBS00241 INSTALLING THE VALVES AND VALVE SPRINGS The following procedure applies to all of the valves and related components. 1. Deburr: valve stem end (with an oil stone) 4 - 31 VALVES AND VALVE SPRINGS ENG Spring tilt limit 2.5°/1.70 mm (0.067 in)