11. CRANKCASE/CRANKSHAFT DOWNTOWN 125i SERVICE INFORMATION GENERAL INSTRUCTIONS · This section covers crankcase separation to service the crankshaft. The engine must be removed for this operation. · When separating the crankcase, never use a driver to pry the crankcase mating surfaces apart forcedly to prevent damaging the mating surfaces. · When installing the crankcase, do not use an iron hammer to tap it. · The following parts must be removed before separating the crankcase. Cylinder head Cylinder/piston (chapter 7) Drive and driven pulley (chapter 8) A.C. generator/starter clutch (chapter 10) Rear wheel/rear shock absorber (chapter 16) Starter motor (chapter 19) Oil pump (chapter 4) SPECIFICATIONS Unit: mm Item Standard 0.150.35 Connecting rod big end side clearance Crankshaft Connecting rod big end radial clearance 00.008 TORQUE VALUES Crankcase bolt 1.0 kgf-m Cam chain tensioner slipper bolt 1.0 kgf-m TROUBLESHOOTING Excessive engine noise · Excessive bearing play · Excessive crankpin bearing play · Worn piston pin and piston pin hole 11-2