11. CRANKCASE/CRANKSHAFT VITALITY 50 SERVICE INFORMATION GENERAL INSTRUCTIONS · This section covers crankcase separation to service the crankshaft. The engine must be removed for this operation. · The following parts must be removed before separating the crankcase. -Cylinder head ( Chapter 6 (2-stroke)) -Cylinder/piston ( Chapter 7) -Drive and driven pulleys ( Chapter 9) -A.C. generator ( Chapter 8) SPECIFICATIONS (2-Stroke) Item Standard (mm) Service Limit (mm) Connecting rod big end side clearance 0.6 Crankshaft Connecting rod big end radial clearance 0.04 Run out A/B 0.1/0.15 SPECIFICATIONS (4-Stroke) Item Standard (mm) Service Limit (mm) Connecting rod small end free play 0.050.4 0.6 Crankshaft Connecting rod big end radial clearance 00.008 0.05 Run out 0.10 TORQUE VALUES Crankcase bolt 0.81.2kgf-m Cam chain tensioner slipper bolt 0.81.2kgf-m (4-Stroke) SPECIAL TOOLS (2-stroke) Crankcase puller E026 Universal bearing puller E030 Crankshaft install tool E016 Crankcase assembly tool E024 Oil seal and bearing install tool E014 TROUBLESHOOTING Abnormal engine noise · Excessive crank journal bearing play · Excessive crankpin bearing play · Excessive transmission bearing play 11-3