{"data":{"id":"us/40-cfr-205.155","jurisdiction":"us","citation":"40 CFR 205.155","heading":"Motorcycle class and manufacturer abbreviation.","body":"(a) Motorcycles must be grouped into classes determined by separate combinations of the following parameters:\n(1) Engine type:\n(i) Gasoline—two stroke.\n(ii) Gasoline—four stroke.\n(iii) Gasoline—rotary.\n(iv) Other.\n(2) Engine displacement.\n(3) Engine configuration:\n(i) Number of cylinders.\n(ii) Cylinder arrangement (i.e., in line, opposed, etc.).\n(4) Exhaust system:\n(i) Muffler: (A) Type, (B) Location, (C) Number.\n(ii) Expansion chambers: (A) Location, (B) Size.\n(iii) Spark arrestors.\n(iv) Other exhaust system components.","path":["Title 40—Protection of Environment","CHAPTER I—ENVIRONMENTAL PROTECTION AGENCY","SUBCHAPTER G—NOISE ABATEMENT PROGRAMS","PART 205—TRANSPORTATION EQUIPMENT NOISE EMISSION CONTROLS","Subpart D—Motorcycles"],"source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-08-25/title-40.xml","current_through":"2026-08-25","vintage":"","retrieved_at":"2026-08-27T02:26:04Z","sha256":"8022115af3b95f3917f89e8927108d981839ce9e348f21b46e111cb6ff868a57","source_id":"us-cfr","stale":true,"prev":"us/40-cfr-205.154","next":"us/40-cfr-205.156"},"notice":"GroundRules: Original legal text. Not legal advice."}