{
  "summary": "HS code 8407.31 covers reciprocating piston engines of a kind used for the propulsion of vehicles of Chapter 87, of a cylinder capacity not exceeding 50 cc. It sits in heading 84.07 (spark-ignition reciprocating or rotary internal combustion piston engines) in chapter 84 (nuclear reactors, boilers, machinery and mechanical appliances; parts thereof). Other goods of heading 84.07 are classified under 8407.10 (aircraft engines), 8407.21 (marine propulsion engines, outboard motors), 8407.29 (marine propulsion engines, other), 8407.32 (reciprocating piston engines of a kind used for the propulsion of vehicles of Chapter 87, of a cylinder capacity exceeding 50 cc but not exceeding 250 cc) or 3 others. National tariff lines under 8407.31 are live on border.bot for the United States (2 lines, also used by 1 other country).",
  "updatedAt": "2026-10-11",
  "facts": [
    {
      "label": "HS code",
      "value": "8407.31",
      "source": "border.bot release GLOBAL:hs #2"
    },
    {
      "label": "Covers",
      "value": "Reciprocating piston engines of a kind used for the propulsion of vehicles of Chapter 87, of a cylinder capacity not exceeding 50 cc",
      "source": "border.bot release GLOBAL:hs #2"
    },
    {
      "label": "Heading",
      "value": "84.07: Spark-ignition reciprocating or rotary internal combustion piston engines",
      "source": "border.bot release GLOBAL:hs #2",
      "url": "https://border.bot/hs-codes/8407"
    },
    {
      "label": "Chapter",
      "value": "84: Nuclear reactors, boilers, machinery and mechanical appliances; parts thereof",
      "source": "border.bot release GLOBAL:hs #2",
      "url": "https://border.bot/hs-codes/84"
    },
    {
      "label": "Edition",
      "value": "HS2022",
      "source": "border.bot release GLOBAL:hs #2"
    },
    {
      "label": "Duty in the United States",
      "value": "See its 2 lines",
      "source": null,
      "url": "https://border.bot/countries/united-states/hs-codes/840731"
    }
  ],
  "faq": [
    {
      "question": "What does HS code 8407.31 cover?",
      "answer": "HS code 8407.31 covers reciprocating piston engines of a kind used for the propulsion of vehicles of Chapter 87, of a cylinder capacity not exceeding 50 cc."
    },
    {
      "question": "Which heading and chapter is HS code 8407.31 in?",
      "answer": "HS code 8407.31 is in heading 84.07 (spark-ignition reciprocating or rotary internal combustion piston engines) in chapter 84 (nuclear reactors, boilers, machinery and mechanical appliances; parts thereof)."
    },
    {
      "question": "Where are goods of heading 84.07 classified when 8407.31 doesn’t fit?",
      "answer": "Other goods of heading 84.07 are classified under 8407.10 (aircraft engines), 8407.21 (marine propulsion engines, outboard motors), 8407.29 (marine propulsion engines, other), 8407.32 (reciprocating piston engines of a kind used for the propulsion of vehicles of Chapter 87, of a cylinder capacity exceeding 50 cc but not exceeding 250 cc) or 3 others."
    },
    {
      "question": "Which countries’ tariffs list national lines under HS code 8407.31?",
      "answer": "National tariff lines under 8407.31 are live on border.bot for the United States (2 lines, also used by 1 other country)."
    }
  ],
  "sections": [
    {
      "id": "covers",
      "title": "What this code covers",
      "text": [
        "HS code 8407.31 covers reciprocating piston engines of a kind used for the propulsion of vehicles of Chapter 87, of a cylinder capacity not exceeding 50 cc.",
        "The legal text of the subheading is “Reciprocating piston engines of a kind used for the propulsion of vehicles of Chapter 87: Of a cylinder capacity not exceeding 50 cc”, read under “Reciprocating piston engines of a kind used for the propulsion of vehicles of Chapter 87”, in HS2022."
      ]
    },
    {
      "id": "not-covered",
      "title": "What it doesn’t cover",
      "text": [
        "Other goods of heading 84.07 are classified under 8407.10 (aircraft engines), 8407.21 (marine propulsion engines, outboard motors), 8407.29 (marine propulsion engines, other), 8407.32 (reciprocating piston engines of a kind used for the propulsion of vehicles of Chapter 87, of a cylinder capacity exceeding 50 cc but not exceeding 250 cc) or 3 others."
      ]
    },
    {
      "id": "structure",
      "title": "How it is structured",
      "text": [
        "8407.31 is a six-digit subheading. Its first two digits, 84, are the chapter; the first four, 8407, are heading 84.07; the last two, 31, identify the subheading within the heading.",
        "Countries add their own digits after these six for their national tariff lines."
      ]
    },
    {
      "id": "other-countries",
      "title": "In other countries",
      "text": [
        "National tariff lines under 8407.31 are live on border.bot for the United States (2 lines, also used by 1 other country)."
      ]
    },
    {
      "id": "sources",
      "title": "Sources and updates",
      "text": [
        "The Harmonized System legal text comes from border.bot release 2 (edition HS 2022), imported from a file, and has been live since 11 October 2026.",
        "This page was last updated on 11 October 2026.",
        "Guidance from published tariff data, not a binding ruling. For a decision customs must follow, apply to the destination’s customs authority for a binding tariff ruling."
      ]
    }
  ],
  "data": {
    "type": "hs-subheading",
    "edition": "HS2022",
    "chapter": {
      "code": "84",
      "description": "Nuclear reactors, boilers, machinery and mechanical appliances; parts thereof"
    },
    "heading": {
      "code": "8407",
      "description": "Spark-ignition reciprocating or rotary internal combustion piston engines"
    },
    "subheading": {
      "code": "840731",
      "description": "Reciprocating piston engines of a kind used for the propulsion of vehicles of Chapter 87: Of a cylinder capacity not exceeding 50 cc",
      "levels": [
        "Reciprocating piston engines of a kind used for the propulsion of vehicles of Chapter 87",
        "Of a cylinder capacity not exceeding 50 cc"
      ],
      "english": null,
      "keywords": []
    },
    "siblings": [
      {
        "code": "840710",
        "description": "Aircraft engines"
      },
      {
        "code": "840721",
        "description": "Marine propulsion engines: Outboard motors"
      },
      {
        "code": "840729",
        "description": "Marine propulsion engines: Other"
      },
      {
        "code": "840732",
        "description": "Reciprocating piston engines of a kind used for the propulsion of vehicles of Chapter 87: Of a cylinder capacity exceeding 50 cc but not exceeding 250 cc"
      },
      {
        "code": "840733",
        "description": "Reciprocating piston engines of a kind used for the propulsion of vehicles of Chapter 87: Of a cylinder capacity exceeding 250 cm3 but not exceeding 1 000 cm3"
      },
      {
        "code": "840734",
        "description": "Reciprocating piston engines of a kind used for the propulsion of vehicles of Chapter 87: Of a cylinder capacity exceeding 1,000 cc"
      },
      {
        "code": "840790",
        "description": "Other engines"
      }
    ],
    "related": [],
    "previous": {
      "code": "840729",
      "description": "Marine propulsion engines: Other",
      "indexable": true
    },
    "next": {
      "code": "840732",
      "description": "Reciprocating piston engines of a kind used for the propulsion of vehicles of Chapter 87: Of a cylinder capacity exceeding 50 cc but not exceeding 250 cc",
      "indexable": true
    },
    "schedules": [
      {
        "code": "US",
        "name": "United States",
        "slug": "united-states",
        "lines": 2,
        "members": 1
      }
    ],
    "provenance": [
      {
        "dataset": "GLOBAL:hs",
        "country": "GLOBAL",
        "kind": "hs",
        "seq": 2,
        "version": "mytraddal hs2022.csv (HS 2022)",
        "liveAt": "2026-10-11T06:04:17.693Z",
        "origin": "upload",
        "sourceUrls": []
      }
    ],
    "dateModified": "2026-10-11T06:04:17.693Z",
    "seo": {
      "canonicalPath": "/hs-codes/840731",
      "robots": "index",
      "sitemap": true,
      "reasons": [
        "live legal text"
      ]
    }
  },
  "pagination": {
    "page": 1,
    "pages": 1,
    "size": 100,
    "total": 0,
    "prev": null,
    "next": null
  },
  "previous": "https://border.bot/hs-codes/840729",
  "next": "https://border.bot/hs-codes/840732",
  "links": {
    "self": "https://border.bot/hs-codes/840731.json",
    "html": "https://border.bot/hs-codes/840731",
    "canonical": "https://border.bot/hs-codes/840731",
    "markdown": "https://border.bot/hs-codes/840731.md",
    "tools": {
      "calculator": "https://border.bot/tools/landed-cost-calculator",
      "classifier": "https://border.bot/tools/hs-code-classifier",
      "api": "https://api.border.bot/v1"
    }
  },
  "code": "840731",
  "attribution": "border.bot tariff reference (border.bot), compiled from the official publishers named on each page.",
  "terms": "https://border.bot/legal/terms",
  "notice": "Guidance from published tariff data, not a binding ruling. For a decision customs must follow, apply to the destination’s customs authority for a binding tariff ruling.",
  "catalogVersion": "08bc53aa"
}