912ULS/914UL, Gear Set 1 2,43, wide

Drive gear 21 Z. and reduction gear 51 Z. are paired and must be replaced together and marked with S/N. with wide dog gear (27mm); see SL-912-002 resp. SL-914-002; At 914 use only from following engine S/N:912 S: starting with serial production912 ULS: starting with serial production914 F : 4,420.164914 UL: 4,417.791