YAMAHA YZ100 YZ125 1977-1978 AHRMA 4th Gear 25T 1W1-17241-01

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YAMAHA  Transmission  4th  Gear Wheel  25T  OEM # 1W1-17241-01  NOS  New Old Stock.  MB8-B/A

Fits the following models:

YZ100E  1978

Y125  D/E  1977-1978