Section 1 Safety and General Information Piston, Piston Rings, and Piston Pin cont. Top and Middle Compression Ring End Gap cont. LH685,LH690 New Bore Top Ring ..................................................................................... 0.180/0.430 mm (0.0071/0.0169 in.) Middle Ring ............................................................................... 0.250/0.460 mm (0.0098/0.0181 in.) Used Bore (Max.) .............................................................................. 0.80 mm (0.0315 in.) LH750,LH755,LH760 LH775 New Bore ...........................................................................................
0.250/0.56 mm (0.0098/0.022 in.) Used Bore .......................................................................................... 0.94 mm (0.037 in.) 1 Piston Thrust Face O.D.І LH630,LH640 New .................................................................................................... 76.968/76.986 mm (3.0302/3.0309 in.) Max. Wear Limit ............................................................................... 76.840 mm (3.0252 in.) LH685,LH690 New .................................................................................................... 79.963/79.981 mm (3.1481/3.1488 in.) Max.
Wear Limit ...............................................................................79.831 mm (3.1430 in.) LH750,LH755,LH760 LH775 New .................................................................................................... 82.973/82.991 mm (3.2666/3.2673 in.) Max.
Wear Limit ...............................................................................82.841 mm (3.3136 in.) Piston Thrust Face-to-Cylinder BoreІ Running Clearance LH630,LH640 ...........................................................................................0.014/0.057 mm (0.0005/0.0022 in.) LH685,LH690 ...........................................................................................0.019/0.062 mm (0.0007/0.0024 in.) LH750,LH755,LH760 LH775..................................................................0.015/0.058 mm (0.005/0.0022 in.) Speed Control Speed Control Bracket Assembly Fastener Torque .................................... 10.7 N·m (95 in.
lb.) into new holes 7.3 N·m (65 in. lb.) into used holes Stator Stator Mounting Screw Torque ..................................................................... 6.2 N·m (55 in. lb.) Valve Cover/Rocker Arms Valve Cover Fastener Torque ........................................................................ 6.2 N·m (55 in. lb.) Valves and Valve Lifters Hydraulic Valve Lifter to Crankcase Running Clearance ......................... 0.0124/0.0501 mm (0.0005/0.0020 in.) Intake Valve Stem-to-Valve Guide Running Clearance .............................
0.038/0.076 mm (0.0015/0.0030 in.) Exhaust Valve Stem-to-Valve Guide Running Clearance..........................0.050/0.088 mm (0.0020/0.0035 in.) Intake Valve Guide I.D. New ........................................................................................................... 7.038/7.058 mm (0.2771/0.2779 in.) Max. Wear Limit ......................................................................................7.134 mm (0.2809 in.) Intake Valve Stem Diameter New ........................................................................................................... 6.982/7.000 mm (0.2749/0.2756 in.) Exhaust Valve Guide I.D.
New ........................................................................................................... 7.038/7.058 mm (0.2771/0.2779 in.) Max. Wear Limit ......................................................................................7.159 mm (0.2819 in.) ІMeasure 6 mm (0.236 in.) above the bottom of the piston skirt at right angles to the piston pin. 1.13