TOPSO STIHL chainsaw clutch bell pinion Bell: 69.45 mm Coupling: 15.00 mm Height: 30.80 mm Pitch: 3/8 Number of teeth: 7 for models: TOPSO all models STIHL 030AV 031AVE 032 041 041AVE after serial no. 5664891 Original part no.: 3203XW Part no.: 001866 TOPSO STIHL SR