---
kind: "section"
citation: "40 C.F.R. § 205.152"
title: "40"
number: "205.152"
heading: "Noise emission standards."
url: "https://uscodex.org/cfr/40/205.152"
---

# §205.152. Noise emission standards.

- (a) **Noise emission standards.**
  - (1) Street motorcycles of the following and subsequent model years must not produce noise emissions in excess of the levels indicated:
    - (i) Street motorcycles other than those that meet the definition of [§ 205.151(a)(2)(ii)](/cfr/40/205.151.md?p=a-2-ii):
    - (ii) Street motorcycles that meet the definition of [§ 205.151(a)(2)(ii)](/cfr/40/205.151.md?p=a-2-ii)(moped-type street motorcycles):
  - (2) Off-road motorcycles of the following and subsequent model years must not produce noise emissions in excess of the levels indicated:
    - (i) **Off-road motorcycles with engine displacements of 170 cc and lower—**
    - (ii) **Off-road motorcycles with engine displacements greater than 170 cc—**
  - (3) Street motorcycles must be designed, built and equipped so that, when properly maintained and used, they will not produce noise emissions in excess of the levels specified in [paragraph (a)(1)](#a-1) of this section, for an Acoustical Assurance Period of one year or a distance of 6000 km (3730 mi) after the time of sale to the ultimate purchaser, whichever occurs first.
  - (4) Off-road motorcycles must be designed, built and equipped so that, when properly maintained and used, they will not produce noise emissions in excess of the levels specified in [paragraph (a)(2)](#a-2) of this section, for an Acoustical Assurance Period of one year or a distance of 3000 km (1865 mi) after the time of sale to the ultimate purchaser, whichever occurs first.
  - (5) At the time of sale to the ultimate purchaser, all products must comply with the standards set forth in paragraphs [(a)(1)](#a-1) and [(2)](#a-2) of this section.
- (b) **Measurement procedure.**
  - (1) The standards set forth in [paragraph (a)](#a) of this section refer to noise emissions as measured in accordance with the measurement methodology specified in Appendix I-1 for all motorcycles except those street motorcycles that meet the definition of [§ 205.151(a)(2)(ii)](/cfr/40/205.151.md?p=a-2-ii).
  - (2) The standards set forth in [paragraph (a)](#a) of this section for street motorcycles that meet the definition of [§ 205.151(a)(2)(ii)](/cfr/40/205.151.md?p=a-2-ii) (moped-type street motorcycles) refer to noise emissions measured in accordance with the measurement methodology specified in Appendix I-2.
- (c) **Low noise emission product standard.** For the purpose of Low-Noise-Emission Product certification pursuant to [40 CFR part 203](/cfr/40/part203.md), motorcycles procured by the Federal government after the following dates must not produce noise emissions in excess of the noise levels indicated:
  - (1) **For street motorcycles with engine displacement greater than 170 cc—**
  - (2) **For off-road motorcycles with engine displacements greater than 170 cc—**
  - (3) For off-road motorcycles with engine displacement 170 cc and lower and street motorcycles with engine displacement 170 cc and lower that do not meet the definition of [§ 205.151(a)(2)(ii)](/cfr/40/205.151.md?p=a-2-ii):
  - (4) For street motorcycles that meet the definition of [§ 205.151(a)(2)(ii)](/cfr/40/205.151.md?p=a-2-ii) (moped-type street motorcycles):

## Notes

### Source

Source: 45 FR 86708, Dec. 31, 1980, unless otherwise noted.

### Authority

Authority: Secs. 6, 10, 11, 13, Pub. L. 92-574, 86 Stat. 1234 (42 U.S.C. 4905, 4909, 4910, 4912).

### Source

Source: 41 FR 15544, Apr. 13, 1976, unless otherwise noted.