Yamaha MOTO-4 1987 Owner's Manual page 6

IMPORTANT NOTICE
THIS VEHICLE IS DESIGNED AND MANUFACTURED FOR OFF-ROAD
USE ONLY. IT IS ILLEGAL TO OPERATE THIS VEHICLE ON ANY
PUBLIC STREET, ROAD OR HIGHWAY. SUCH USE IS PROHIBITED
BY LAW.
THIS VEHICLE COMPLIES WITH ALMOST ALL STATE OFF-HIGHWAY
NOISE LEVEL AND SPARK ARRESTER LAWS AND REGULATIONS.
PLEASE CHECK YOUR LOCAL RIDING LAWS AND REGULATIONS
BEFORE OPERATING THIS VEHICLE.