Notes: 129A00-25120 GEAR ASSY, IDLE B is original YANMAR product. 129A00-25120 GEAR ASSY, IDLE B5 is commonly used in transmissions/axles/engines 4TNV88C-PYBU, 4TNV88C-PTB, 4TNV88C-PTB1, 3TNV86CT-DMW, 4TNV86CT-PTB1, . if you have any questions please do not hesitate to contact us via Whatsapp +17275652849