40 CFR 205.155
§ 205.155 Motorcycle class and manufacturer abbreviation.
United States · 40 CFR — Protection of Environment · Status: effective
Cite this
- Citation
- 40 CFR 205.155, § 205.155 Motorcycle class and manufacturer abbreviation, United States, version 1 as recorded 2026-07-09, yourstate.us, https://yourstate.us/provision/184563
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Full text
(a) Motorcycles must be grouped into classes determined by separate combinations of the following parameters:
(1) Engine type:
(i) Gasoline—two stroke.
(ii) Gasoline—four stroke.
(iii) Gasoline—rotary.
(iv) Other.
(2) Engine displacement.
(3) Engine configuration:
(i) Number of cylinders.
(ii) Cylinder arrangement (i.e., in line, opposed, etc.).
(4) Exhaust system:
(i) Muffler:
(A) Type, (B) Location, (C) Number.
(ii) Expansion chambers:
(A) Location, (B) Size.
(iii) Spark arrestors.
(iv) Other exhaust system components.
Legislative history
This is a federal regulation, adopted through agency rulemaking under the Administrative Procedure Act — not enacted by a recorded vote of Congress.