1.11
Section 1
Safety and General Information
1
Ignition
Spark Plug Type (Champion
®
or equivalent) ............................................. RC12YC or Platinum 3071
Spark Plug Gap
CH11-15 .................................................................................................... 1.02 mm (0.040 in.)
CH16 .......................................................................................................... 0.76 mm (0.030 in.)
Spark Plug Torque .......................................................................................... 38.0-43.4 N·m (28-32 ft. lb.)
Ignition Module Air Gap ............................................................................... 0.203/0.305 mm (0.008/0.012 in.)
Ignition Module Fastener Torque ................................................................. 4.0 N·m (35 in. lb.) into new holes
6.2 N·m (55 in. lb.) into used holes
Muffler
Muffler Retaining Nuts .................................................................................. 24.4 N·m (216 in. lb.)
Piston, Piston Rings, and Piston Pin
Piston-to-Piston Pin (selective fit) ............................................................... 0.006/0.017 mm (0.0002/0.0007 in.)
Piston Pin Bore I.D.
New ........................................................................................................... 19.006/19.012 mm (0.7483/0.7485 in.)
Max. Wear Limit ...................................................................................... 19.025 mm (0.7490 in.)
Piston Pin O.D.
New ........................................................................................................... 18.995/19.000 mm (0.7478/0.7480 in.)
Max. Wear Limit ...................................................................................... 18.994 mm (0.74779 in.)
Top Compression Ring-to-Groove Side Clearance
CH11-14 .................................................................................................... 0.040/0.105 mm (0.0016/0.0041 in.)
CH15, CH16 .............................................................................................. 0.060/0.105 mm (0.0023/0.0041 in.)
Middle Compression Ring-to-Groove Side Clearance
CH11-14 .................................................................................................... 0.040/0.072 mm (0.0016/0.0028 in.)
CH15, CH16 .............................................................................................. 0.040/0.085 mm (0.0015/0.0002 in.)
Oil Control Ring-to-Groove Side Clearance
CH11-14 .................................................................................................... 0.551/0.675 mm (0.0217/0.0266 in.)
CH15, CH16 .............................................................................................. 0.176/0.026 (0.0069/0.0010 in.)
Top and Center Compression Ring End Gap
New Bore
CH11-14 ................................................................................................ 0.3/0.5 mm (0.012/0.020 in.)
CH15, CH16 .......................................................................................... 0.27/0.51 mm (0.010/0.020 in.)
Used Bore (Max.) ...................................................................................... 0.77 mm (0.030 in.)
Piston Thrust Face O.D.
New
CH11-14
3
............................................................................................... 86.941/86.959 mm (3.4229/3.4236 in.)
CH15, CH16
4
......................................................................................... 89.951/89.969 mm (3.5413/3.5420 in.)
Max. Wear Limit
CH11-14 ................................................................................................ 86.814 mm (3.4179 in.)
CH15, CH16 .......................................................................................... 89.824 mm (3.5363 in.)
3
Measure 6 mm (0.236 in.) above the bottom of the piston skirt at right angles to the piston pin.
4
Measure 8 mm (0.314 in.) above the bottom of the piston skirt at right angles to the piston pin.
