This is an owner's service manual containing maintenance information for the Yamaha YZ250. It's a new, vintage item from the time, so there may be some discoloration, but the contents are particularly clean. Rare item. 4EW3 YAMAHA YZ250 Believed to be the 1993 model. The specified oils were Yamaha genuine Infini, Castrol R30, and A747, with a mixing ratio of 20:1. - Brand: Yamaha - Model Name: YZ250 - Type: Owner's Service Manual - Number of Pages: Maintenance information on multiple pages - Language: Japanese Thank you for viewing.