12. CRANKCASE/CRANKSHAFT ATV 50 Measure the crankshaft runout. Service Limit A B 0.15 mm (0.006 in) 0.1 mm (0.004 in) replace if over replace if over Check the crankshaft bearings for excessive play. The bearings must be replaced if they are noisy or have excessive play. Play Play Axial Radial CRANKSHAFT INSTALLATION Wash the crankshaft in cleaning solvent and then check for cracks or other faults. · After check, apply clean engine oil to all moving and sliding parts. · Remove all gasket material from the crankcase mating surfaces. Dress any roughness or irregularities with an oil stone. 12-5