Interpretation ID: aiam2026
Legislative Analyst
Engineering Division
Yamaha International Corporation
P. O. Box 6600
Buena Park
CA 90622;
Dear Mr. Jura: This is in reply to your letter of August 5, 1975, asking whether prototype 'stiff rubber supported turn signal' would comply with S4.3.1 of Motor Vehicle Safety Standard No. 108.; S4.3.1 requires lighting equipment to 'be securely mounted on a rigi part of the vehicle.' Your proposed turn signal lamp is mounted at the end of a stiff rubber bracket which is attached to the vehicle. The bracket must be considered part of the vehicle. Obviously, even with a metal mounting there will be some vibration transmitted from the motorcycle to the lamp when the engine is running. We would consider the prototype mounting to be sufficiently 'rigid' to conform to the standard if the rubber mount is stiff enough so that there is little or no amplification of vibration when the engine is running.; Yours truly, Richard B. Dyson, Assistant Chief Counsel