Chapter 84 is one of the largest chapters in the HS classification system, covering various power machinery, mechanical equipment and their parts. This chapter includes steam boilers, internal combustion engines, turbines, pumps, compressors, fans, bearings, gears, transmission devices, seals, etc. The core characteristic is that these machines achieve energy conversion or perform work through mechanical motion, rather than relying on electrical or electronic principles. 8407 falls within the internal combustion engine category of this chapter, specifically for spark-ignition reciprocating piston engines. Heading 8407 covers spark-ignition reciprocating or rotary internal combustion engines, including gasoline engines used for vehicles, ships, aircraft, power generation, and other purposes. Engines under this heading are characterized by spark plug ignition, distinguishing them from compression-ignition (diesel) engines of 8408. 8407 is further subdivided by displacement, purpose, etc. 840733 is one of its subheadings, specifically for reciprocating piston engines with a displacement between 250cc and 1000cc. Code 840733 has 6 digits: the first 2 digits "84" represent Chapter 84, i.e., nuclear reactors, boilers, machinery, mechanical appliances and their parts; digits 3-4 "07" represent heading 8407, i.e., spark-ignition reciprocating or rotary internal combustion engines; digits 5-6 "33" represent subheading 840733, specifically reciprocating piston engines with a displacement exceeding 250cc but not exceeding 1000cc. This subheading is further distinguished from 840731 (displacement ≤50cc), 840732 (50cc<displacement≤250cc), 840734 (displacement>1000cc), etc. This commodity is a spark-ignition reciprocating piston engine with a displacement between 250cc and 1000cc, conforming to the description of subheading 840733. It is not classified under 8408 (compression-ignition engines), nor under other subheadings of 8407, because the displacement range is clearly defined. Meanwhile, if the engine is used for specific vehicles (such as motorcycles, snowmobiles, etc.), it is still classified under this heading, but attention must be paid to distinguishing between complete vehicles and parts.
Chapter
Chapter 84 is one of the largest chapters in the HS classification system, covering various power machinery, mechanical equipment and their parts. This chapter includes steam boilers, internal combustion engines, turbines, pumps, compressors, fans, bearings, gears, transmission devices, seals, etc. The core characteristic is that these machines achieve energy conversion or perform work through mechanical motion, rather than relying on electrical or electronic principles. 8407 falls within the internal combustion engine category of this chapter, specifically for spark-ignition reciprocating piston engines.
Heading
Heading 8407 covers spark-ignition reciprocating or rotary internal combustion engines, including gasoline engines used for vehicles, ships, aircraft, power generation, and other purposes. Engines under this heading are characterized by spark plug ignition, distinguishing them from compression-ignition (diesel) engines of 8408. 8407 is further subdivided by displacement, purpose, etc. 840733 is one of its subheadings, specifically for reciprocating piston engines with a displacement between 250cc and 1000cc.
Digit Breakdown
Code 840733 has 6 digits: the first 2 digits "84" represent Chapter 84, i.e., nuclear reactors, boilers, machinery, mechanical appliances and their parts; digits 3-4 "07" represent heading 8407, i.e., spark-ignition reciprocating or rotary internal combustion engines; digits 5-6 "33" represent subheading 840733, specifically reciprocating piston engines with a displacement exceeding 250cc but not exceeding 1000cc. This subheading is further distinguished from 840731 (displacement ≤50cc), 840732 (50cc<displacement≤250cc), 840734 (displacement>1000cc), etc.
Classification Basis
This commodity is a spark-ignition reciprocating piston engine with a displacement between 250cc and 1000cc, conforming to the description of subheading 840733. It is not classified under 8408 (compression-ignition engines), nor under other subheadings of 8407, because the displacement range is clearly defined. Meanwhile, if the engine is used for specific vehicles (such as motorcycles, snowmobiles, etc.), it is still classified under this heading, but attention must be paid to distinguishing between complete vehicles and parts.
📝 Declaration Elements
Product Name: The specific name of the declared engine, such as "gasoline engine", "reciprocating piston engine", etc., which must be consistent with the actual product. Brand: Fill in the brand of the engine, such as "Honda", "Yamaha", etc. If there is no brand, fill in "no brand". Model: Fill in the specific model or specification of the engine, such as "CG150", "JL250", etc. Displacement: Fill in the piston displacement of the engine, in cc (milliliters), which must be between 250cc and 1000cc. Ignition Method: Indicate spark ignition (gasoline engine), distinguishing it from compression ignition (diesel engine). Purpose: Fill in the purpose of the engine, such as "for motorcycles", "for generator sets", "for ships", etc. Power: Fill in the rated power of the engine, in kilowatts (kW) or horsepower (hp). Whether in Complete Knock-Down/Semi-Knock-Down Form: Indicate whether it is in complete knock-down/semi-knock-down (CKD/SKD) form, which affects declaration and tax rates. Product Name: Gasoline Engine; Brand: Honda; Model: CG250; Displacement: 250cc; Ignition Method: Spark Ignition; Purpose: For Motorcycles; Power: 15kW; Whether in CKD/SKD Form: No. Displacement unit incorrectly filled as liters, such as 0.25 liters, leading to classification errors. Ignoring the ignition method, misreporting a gasoline engine as a diesel engine, classified under 8408. Purpose filled in too broadly, such as "industrial use", without specifying motorcycles or generator sets.
Product Name
The specific name of the declared engine, such as "gasoline engine", "reciprocating piston engine", etc., which must be consistent with the actual product.
⚠️ Vaguely filling in "engine" without specifying the ignition method or type.
Brand
Fill in the brand of the engine, such as "Honda", "Yamaha", etc. If there is no brand, fill in "no brand".
⚠️ Confusing brand with model, or omitting the brand leading to classification disputes.
Model
Fill in the specific model or specification of the engine, such as "CG150", "JL250", etc.
⚠️ Incomplete model information, making it impossible to determine displacement.
Displacement
Fill in the piston displacement of the engine, in cc (milliliters), which must be between 250cc and 1000cc.
⚠️ Incorrect displacement unit (e.g., written as liters), or displacement out of range without adjusting the code.
Ignition Method
Indicate spark ignition (gasoline engine), distinguishing it from compression ignition (diesel engine).
⚠️ Incorrectly filling in as compression ignition, leading to classification under 8408.
Purpose
Fill in the purpose of the engine, such as "for motorcycles", "for generator sets", "for ships", etc.
⚠️ Vague purpose description, such as "for machinery", affecting classification.
Power
Fill in the rated power of the engine, in kilowatts (kW) or horsepower (hp).
⚠️ Inconsistent power units, or failure to provide power data.
Whether in Complete Knock-Down/Semi-Knock-Down Form
Indicate whether it is in complete knock-down/semi-knock-down (CKD/SKD) form, which affects declaration and tax rates.
⚠️ Failure to indicate knock-down status, causing customs clearance delays.
Displacement unit incorrectly filled as liters, such as 0.25 liters, leading to classification errors.
Ignoring the ignition method, misreporting a gasoline engine as a diesel engine, classified under 8408.
Purpose filled in too broadly, such as "industrial use", without specifying motorcycles or generator sets.
🎯 Classification Logic
The core basis for classification is the engine's ignition method (spark ignition), working method (reciprocating piston), and displacement range (250cc-1000cc). First confirm it belongs to heading 8407, then determine the subheading based on displacement. Displacement must be accurately measured, based on cylinder working volume. If the engine is rotary type, it is classified under other subheadings of 8407. Meanwhile, attention must be paid to whether it belongs to complete vehicle parts; if it is a complete vehicle, it is classified under Chapter 87. 840732 Reciprocating engines with displacement 50-250cc: Different displacement range: 840732 is above 50cc to 250cc, 840733 is above 250cc to 1000cc. Displacement is the core distinguishing point. 840734 Reciprocating engines with displacement exceeding 1000cc: Displacement exceeds 1000cc, usually used for automobiles, while 840733 is mostly used for motorcycles and small equipment. 8408 Compression-ignition internal combustion engines: Different ignition method: 8408 is diesel engines, 8407 is gasoline engines. The ignition method must be clearly stated at declaration. 840790 Other spark-ignition internal combustion engines: 840790 is rotary or otherwise unspecified spark-ignition engines; 840733 specifically refers to reciprocating piston engines with a specific displacement. 8711 Motorcycles and cycles fitted with an auxiliary engine: 8711 is complete vehicles, 840733 is engine parts. If importing complete vehicles, classify under 8711; if importing engines separately, classify under 840733. Confirm the ignition method is spark ignition (gasoline engine). Confirm the working method is reciprocating piston. Confirm the displacement is between 250cc and 1000cc. Confirm the purpose, whether used for motorcycles and other specific vehicles. Confirm whether in CKD/SKD form, and whether it affects complete vehicle classification.
Basis
The core basis for classification is the engine's ignition method (spark ignition), working method (reciprocating piston), and displacement range (250cc-1000cc). First confirm it belongs to heading 8407, then determine the subheading based on displacement. Displacement must be accurately measured, based on cylinder working volume. If the engine is rotary type, it is classified under other subheadings of 8407. Meanwhile, attention must be paid to whether it belongs to complete vehicle parts; if it is a complete vehicle, it is classified under Chapter 87.
Confused Codes：
840732 - Reciprocating engines with displacement 50-250cc
Different displacement range: 840732 is above 50cc to 250cc, 840733 is above 250cc to 1000cc. Displacement is the core distinguishing point.
840734 - Reciprocating engines with displacement exceeding 1000cc
Displacement exceeds 1000cc, usually used for automobiles, while 840733 is mostly used for motorcycles and small equipment.
Different ignition method: 8408 is diesel engines, 8407 is gasoline engines. The ignition method must be clearly stated at declaration.
840790 - Other spark-ignition internal combustion engines
840790 is rotary or otherwise unspecified spark-ignition engines; 840733 specifically refers to reciprocating piston engines with a specific displacement.
8711 - Motorcycles and cycles fitted with an auxiliary engine
8711 is complete vehicles, 840733 is engine parts. If importing complete vehicles, classify under 8711; if importing engines separately, classify under 840733.
Self-Check：
✓ Confirm the ignition method is spark ignition (gasoline engine).
✓ Confirm the working method is reciprocating piston.
✓ Confirm the displacement is between 250cc and 1000cc.
✓ Confirm the purpose, whether used for motorcycles and other specific vehicles.
✓ Confirm whether in CKD/SKD form, and whether it affects complete vehicle classification.
❓ FAQ
How to inquire about the import tax rate for 840733? The tax rate must be queried according to the latest customs tariff. It can be checked through the official website of the General Administration of Customs of China, the International Trade Single Window, or professional databases. Note that tax rates may vary due to trade agreements and different countries of origin. It is recommended to refer to the tariff at the time of declaration. Which code is an engine with a displacement of exactly 250cc classified under? An engine with a displacement of 250cc, if spark-ignition reciprocating, should be classified under 840733, because subheading 840733 is "exceeding 250cc to 1000cc", and 250cc itself is not included. However, in practice it is often classified under 840733 as 250cc, subject to customs determination. What is the difference in HS codes between motorcycle engines and automobile engines? Mainly based on displacement. Automobile engine displacement usually exceeds 1000cc, classified under 840734; motorcycle engine displacement is mostly 250-1000cc, classified under 840733. However, if an automobile engine has a displacement less than 1000cc, it is also classified under 840733. What should be done if the displacement is filled in incorrectly at declaration? If not yet released, you may apply to customs for modification of the declaration form; if already released, you need to voluntarily disclose and pay supplementary taxes, and may face penalties. It is recommended to carefully verify displacement data before declaration. What is the main difference between 840733 and 840732? Both are spark-ignition reciprocating engines. The difference lies in displacement: 840732 is above 50cc to 250cc, 840733 is above 250cc to 1000cc. Displacement is the sole distinguishing criterion. Are there special requirements for importing used engines classified under 840733? Used engines may involve solid waste control, requiring pre-shipment inspection certificates and compliance with national environmental standards. It is recommended to consult customs and environmental authorities in advance. How are engines in CKD/SKD form classified? If the knock-down parts already constitute the essential character of an engine, they are still classified under 840733; if not, they may be classified as parts. Judgment should be based on the rules regarding CKD/SKD in the "Explanatory Notes to the Tariff". If a 840733 engine is used for a generator set, does the code change? No. The engine itself is still classified under 840733, and the complete generator set is classified under 8502. If the engine and generator are imported together, judgment should be based on whether they constitute a complete unit.
Q: How to inquire about the import tax rate for 840733?
A: The tax rate must be queried according to the latest customs tariff. It can be checked through the official website of the General Administration of Customs of China, the International Trade Single Window, or professional databases. Note that tax rates may vary due to trade agreements and different countries of origin. It is recommended to refer to the tariff at the time of declaration.
Q: Which code is an engine with a displacement of exactly 250cc classified under?
A: An engine with a displacement of 250cc, if spark-ignition reciprocating, should be classified under 840733, because subheading 840733 is "exceeding 250cc to 1000cc", and 250cc itself is not included. However, in practice it is often classified under 840733 as 250cc, subject to customs determination.
Q: What is the difference in HS codes between motorcycle engines and automobile engines?
A: Mainly based on displacement. Automobile engine displacement usually exceeds 1000cc, classified under 840734; motorcycle engine displacement is mostly 250-1000cc, classified under 840733. However, if an automobile engine has a displacement less than 1000cc, it is also classified under 840733.
Q: What should be done if the displacement is filled in incorrectly at declaration?
A: If not yet released, you may apply to customs for modification of the declaration form; if already released, you need to voluntarily disclose and pay supplementary taxes, and may face penalties. It is recommended to carefully verify displacement data before declaration.
Q: What is the main difference between 840733 and 840732?
A: Both are spark-ignition reciprocating engines. The difference lies in displacement: 840732 is above 50cc to 250cc, 840733 is above 250cc to 1000cc. Displacement is the sole distinguishing criterion.
Q: Are there special requirements for importing used engines classified under 840733?
A: Used engines may involve solid waste control, requiring pre-shipment inspection certificates and compliance with national environmental standards. It is recommended to consult customs and environmental authorities in advance.
Q: How are engines in CKD/SKD form classified?
A: If the knock-down parts already constitute the essential character of an engine, they are still classified under 840733; if not, they may be classified as parts. Judgment should be based on the rules regarding CKD/SKD in the "Explanatory Notes to the Tariff".
Q: If a 840733 engine is used for a generator set, does the code change?
A: No. The engine itself is still classified under 840733, and the complete generator set is classified under 8502. If the engine and generator are imported together, judgment should be based on whether they constitute a complete unit.
⚠️ Disclaimer: HS code classification, declaration elements, tariff rates and regulatory conditions on this page are for reference only and do not constitute legal advice on customs classification. Tariff rates and regulations are subject to change; the latest announcements from the General Administration of Customs and on-site determinations shall prevail. Please consult professional customs brokers or customs authorities before import/export.