SAE J 2825

This SAE Recommended Practice establishes test procedures, test conditions, environment, and instrumentation for determining the exhaust sound pressure levels of stationary motorcycles. These are based on a comprehensive study of a wide variety of on-highway motorcycles, and therefore are intended to be applied to on-highway motorcycles. For off-highway motorcycles, SAE J1287 continues to be the recommended practice.

This document is intended to provide a basis for roadside monitoring or screening of stationary on-highway motorcycle exhaust sound pressure levels where use of a more comprehensive procedure for measuring total motorcycle sound during operation, such as SAE J331 or SAE J47, is not practical.