Chapter 84 is a broad category in the HS classification system covering 'nuclear reactors, boilers, machinery and mechanical appliances; parts thereof'. This chapter has an extremely wide scope, including power machinery (such as internal combustion engines, steam turbines), pumps, compressors, fans, refrigeration equipment, rubber and plastics processing machinery, printing machinery, textile machinery, machine tools, office equipment, automatic data processing equipment, etc. Its core characteristic is that the goods are machines or mechanical appliances with independent functions, and mostly involve energy conversion, material handling, or processing. Within the chapter, tariff lines are arranged by function or industry, and 8407 specifically refers to spark-ignition reciprocating or rotary internal combustion engines. Heading 8407 covers 'spark-ignition reciprocating or rotary internal combustion engines'. Specifically, it includes gasoline engines, gas engines, and other engines that rely on spark ignition of the air-fuel mixture to produce power, whether used for vehicles, ships, aircraft, or other purposes. This heading is divided into subheadings by displacement or power, such as 8407.10 for aircraft engines, 8407.2 for marine use, 8407.3 for vehicle use, and 8407.90 for other uses. Subheadings 8407.32 to 8407.34 further subdivide vehicle reciprocating engines by displacement. Code 840732 is a six-digit subheading. The first 2 digits '84' represent Chapter 84 (nuclear reactors, boilers, machinery and mechanical appliances; parts thereof), indicating that the goods belong to the machinery category. The 3rd-4th digits '07' represent heading 8407, namely spark-ignition reciprocating or rotary internal combustion engines, distinguishing it from 8408 compression-ignition internal combustion engines (diesel engines) and 8412 other engines and motors. The 5th-6th digits '32' represent subheading 8407.32, specifically referring to reciprocating piston engines for vehicles (headings 87.01 to 87.05) with a displacement of more than 50cc but not more than 250cc. This subheading is not further subdivided, but attention must be paid to the definition of the displacement range. The goods are reciprocating engines with a displacement of 50-250cc and are used for vehicles (such as motorcycles, small automobiles, etc.), and therefore are classified under 8407.32. If the displacement exceeds 250cc but does not exceed 1000cc, it is classified under 8407.33; if it exceeds 1000cc, it is classified under 8407.34. If used for ships, it is classified under 8407.21 to 8407.29; if used for aircraft, under 8407.10. If it is a compression-ignition (diesel) engine, it is classified under 8408. Therefore, this code specifically refers to spark-ignition, reciprocating piston engines for vehicles with a displacement of 50-250cc.

Product name: The specific name of the declared engine, such as 'gasoline engine', 'gasoline engine for motorcycles', etc., which must be consistent with the actual goods. Use: Explain the final application scenario of the engine, such as 'for motorcycles', 'for small passenger cars', etc., and it must be specific to the vehicle type. Brand: The brand or manufacturer name of the engine, such as 'Honda', 'Yamaha', etc.; if there is no brand, fill in 'no brand'. Model: The model or specification code of the engine, such as '152FMI', '169FMM', etc., used to uniquely identify the product. Displacement: The piston displacement of the engine, expressed in milliliters (cc) or liters (L), and must be accurate to a specific value, such as '125cc'. Whether reciprocating: Confirm whether the engine is reciprocating piston type; fill in 'yes' or 'no'. Rotary engines are not classified under this subheading. Whether spark-ignition: Confirm whether the engine is spark-ignition (gasoline engine); fill in 'yes' or 'no'. Compression-ignition (diesel engine) is classified under 8408. Power: The rated power of the engine, expressed in kilowatts (kW) or horsepower (hp), to assist in confirming displacement and use. Customs declaration example: Product name: Gasoline engine for motorcycles Use: For two-wheeled motorcycles Brand: Honda Model: WH152FMI Displacement: 149cc Whether reciprocating: Yes Whether spark-ignition: Yes Power: 8.5kW Remarks: Displacement is between 50-250cc, used for vehicles, classified under HS code 840732. The displacement unit is mistakenly filled in as liters without conversion, such as filling 125cc as 0.125 liters, resulting in inconsistency with the subheading range. The use is filled in too broadly, such as 'for machinery', without specifying the vehicle type, and it may be classified under 8407.90. Confusing spark-ignition and compression-ignition, incorrectly declaring a diesel engine as a gasoline engine, which should be classified under 8408. Ignoring the 'reciprocating' limitation, declaring a rotary engine (rotary type) as reciprocating, resulting in incorrect classification.

The core basis for classification is: 1) Engine type: must be a spark-ignition reciprocating or rotary internal combustion engine, excluding compression-ignition (8408) and other engines (8412); 2) Use: must be for vehicles of headings 87.01 to 87.05, including motorcycles, passenger cars, special-purpose vehicles, etc., excluding ships (8407.21), aircraft (8407.10), and general-purpose use (8407.90); 3) Displacement: must be between 50cc and 250cc, including 50cc but excluding 250cc? In fact, subheading 8407.32 is 'exceeding 50cc but not exceeding 250cc', so 50cc itself is classified under 8407.31? Verification needed: subheading 8407.31 is 'not exceeding 50cc', and 8407.32 is 'exceeding 50cc but not exceeding 250cc', therefore 50cc is classified under 8407.31, and the 50-250cc range should be understood as >50cc and ≤250cc. 4) Confirm whether it is a reciprocating piston type. 840731 Reciprocating engines for vehicles with displacement not exceeding 50cc: Displacement ≤50cc, whereas 840732 is >50cc and ≤250cc. The core difference is whether the displacement exceeds 50cc. 840733 Reciprocating engines for vehicles with displacement exceeding 250cc but not exceeding 1000cc: Displacement >250cc and ≤1000cc, whereas 840732 is ≤250cc. The difference lies in the upper displacement limit. 840734 Reciprocating engines for vehicles with displacement exceeding 1000cc: Displacement >1000cc, with no overlap with the displacement range of 840732. 840790 Other spark-ignition reciprocating or rotary internal combustion engines: Used for non-vehicle purposes, such as generator sets, agricultural machinery, etc., whereas 840732 is specifically for vehicles. 840820 Compression-ignition internal combustion engines for vehicles (diesel engines): Compression-ignition rather than spark-ignition; the displacement range may overlap, but the working principle is different. Confirm that the engine is spark-ignition (gasoline engine) rather than compression-ignition. Confirm that the engine is reciprocating piston type rather than rotary type. Confirm that the use is for vehicles of headings 87.01 to 87.05. Confirm that the displacement is >50cc and ≤250cc. Check the displacement unit to avoid confusion between cc and liters.

How to determine whether an engine is classified under 840732? It must simultaneously satisfy: 1) spark-ignition (gasoline engine); 2) reciprocating piston type; 3) used for vehicles (87.01-87.05); 4) displacement exceeding 50cc but not exceeding 250cc. If any condition is not met, it is classified under another subheading, such as 840731, 840733, or 840790. Under which code is an engine with a displacement of exactly 250cc classified? Subheading 840732 is 'exceeding 50cc but not exceeding 250cc', therefore 250cc is included and classified under 840732. If the displacement is 50cc, it is classified under 840731 (not exceeding 50cc). Is there any difference in classification between motorcycle engines and automobile engines? There is no difference. As long as they are used for vehicles of headings 87.01 to 87.05, they are classified under 8407.31 to 8407.34 according to displacement. Motorcycles belong to 87.11, and automobiles belong to 87.03; both apply to the same subheadings. Can a diesel engine be classified under 840732? No. 840732 applies only to spark-ignition (gasoline) engines. Diesel engines are compression-ignition and should be classified under 8408, such as 840820 (compression-ignition engines for vehicles). Where is a rotary engine (rotary type) with a displacement of 50-250cc used for motorcycles classified? A rotary engine is a rotary internal combustion engine. If used for vehicles, it should be classified under 8407.90? In fact, the subdivision of 8407 subheadings by displacement applies only to reciprocating type; rotary vehicle engines should be classified under 8407.90? Verification needed: subheading 8407.32 explicitly refers to 'reciprocating piston engines', and rotary type does not apply, so it is classified under 8407.90 (other). What are the consequences of filling in the displacement incorrectly during declaration? Displacement is a key element for classification. Incorrect filling may lead to incorrect classification, thereby affecting tariffs, regulatory conditions, etc. For example, filling 250cc as 300cc will result in incorrect classification under 840733, possibly leading to tax recovery, fines, or customs questioning. How to check the import tariff rate and regulatory conditions for 840732? You can log on to the official website of the General Administration of Customs of China or use the 'Customs Import and Export Tariff' to check, or query through the 'Single Window' system. Tariff rates and regulatory conditions may be adjusted with policy changes; it is recommended to rely on the latest tariff schedule. Are engine parts also classified under 840732? No. 840732 is the code for complete engines, and parts should be classified under 8409 (parts specially or principally for engines of 8407 or 8408). However, note that if parts are declared together with the engine, they may be classified as a complete machine.