Section 1 Safety and General Information Ignition Spark Plug Type (Champion ® or equivalent)....................................................... RC14YC Spark Plug Gap ........................................................................................................ 0.76 mm (0.030 in.) Spark Plug Torque ................................................................................................... 24.4-29.8 N·m (18-22 ft. lb.) Ignition Module Air Gap ........................................................................................ 0.203/0.305 mm (0.008/0.012 in.) Ignition Module Fastener Torque ..........................................................................
6.2 N·m (55 in. lb.) into new hole 4.0 N·m (35 in. lb.) into used hole Rectifier-Regulator Fastener Torque ..................................................................... 4.0 N·m (35 in. lb.) Muffler Muffler Retaining Nuts Torque ............................................................................. 24.4 N·m (216 in. lb.) Oil Filter Oil Filter Torque ....................................................................................................... 3/4-1 turn after gasket contact Piston, Piston Rings, and Piston Pin Piston-to-Piston Pin .................................................................................................
0.006/0.018 mm (0.0002/0.0007 in.) Piston Pin Bore I.D. New .................................................................................................................... 17.006/17.013 mm (0.6695/0.6698 in.) Max. Wear Limit ............................................................................................... 17.025 mm (0.6703 in.) Piston Pin O.D. New .................................................................................................................... 16.995/17.000 mm (0.6691/0.6693 in.) Max. Wear Limit ...............................................................................................
16.994 mm (0.6691 in.) Top Compression Ring-to-Groove Side Clearance LH630,LH640 .................................................................................................... 0.040/0.086 mm (0.0016/0.0034 in.) LH685,LH690 .................................................................................................... 0.050/0.096 mm (0.0020/0.0038 in.) LH750,LH755,LH760,LH775........................................................................... 0.014/0.041 mm (0.0005/0.0016 in.) Middle Compression Ring-to-Groove Side Clearance LH630,LH640 ....................................................................................................
0.040/0.086 mm (0.0016/0.0034 in.) LH685,LH690 .................................................................................................... 0.030/0.076 mm (0.0012/0.0030 in.) LH750,LH755,LH760,LH775........................................................................... 0.012/0.039 mm (0.0004/0.0015 in.) Oil Control Ring-to-Groove Side Clearance LH630,LH640 .................................................................................................... 0.046/0.196 mm (0.0018/0.0077 in.) LH685,LH690 ....................................................................................................
0.046/0.196 mm (0.0018/0.0077 in.) LH750,LH755,LH760,LH775........................................................................... 0.026/0.176 mm (0.0010/0.0070 in.) Top and Middle Compression Ring End Gap LH630,LH640 New Bore Top Ring ......................................................................................................... 0.180/0.380 mm (0.0071/0.0150 in.) Middle Ring ................................................................................................... 0.250/0.450 mm (0.0098/0.0177 in.) Used Bore (Max.) .............................................................................................
0.77 mm (0.030 in.) ІMeasure 6 mm (0.236 in.) above the bottom of the piston skirt at right angles to the piston pin. 1.12