My camera won't focus on such small lettering but here's what it says:
Line 1:MOTORCYCLE NOISE EMISSION CONTROL INFORMATION
Line 2: THIS 1984 YAM5U90049 MOTORCYCLE MEETS EPA NOISE EMISSION
Line 3: REQUIREMENTS OF 70dB(A) AT 5225 RPM BY THE FEDERAL TEST.
Line 4: PROCEDURE-MODIFICATIONS WHICH CAUSE THIS MOTORCYCLE TO
Line 5: EXCEED FEREDERAL NOISE STANDARDS ARE PROHIBITED BY FEDERAL
Line 6: LAW. SEE OWNERS MANUAL
Size is 90mm x 18mm. Also on US bikes is another horn cover sticker on frame just below weld for gas tank support. The only French is on the Main Switch Operation sticker on back side of speedo head. English on left, French on right.