11.CRANKCASE/CRANKSHAFT Mongoose/KXR 90/50 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 7 (Mongoose/KXR 90)) -Cylinder/piston ( Chapter 8) -Drive and driven pulleys ( Chapter 9) -A.C. generator ( Chapter 14) -Starter clutch ( Chapter 16) -Oil pump ( Chapter 4) SPECIFICATIONS (Mongoose/KXR 90) 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 SPECIFICATIONS (Mongoose/KXR 50) 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 TORQUE VALUES Crankcase bolt 0.81.2kgf-m Cam chain tensioner slipper bolt 0.81.2kgf-m (Mongoose/KXR 90) SPECIAL TOOLS (Mongoose/KXR 50) 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