8407.31.00 - Of a cylinder capacity not exceeding 50 cc

This HTS classification, 8407.31.00, pertains to spark-ignition internal combustion piston engines that are of the reciprocating type and are designed for the propulsion of vehicles falling within Chapter 87 of the Harmonized Tariff Schedule. Specifically, this category is defined by its cylinder capacity, encompassing engines where this capacity does not exceed 50 cubic centimeters (cc). These engines are characterized by their use of spark ignition to initiate combustion within their cylinders and their mechanical design as reciprocating piston engines.

The critical differentiating factor for this subcategory, 8407.31.00, lies in its limited engine size. It is distinct from its sibling categories which cover engines with larger cylinder capacities: 8407.32 for capacities exceeding 50 cc but not exceeding 250 cc, 8407.33 for capacities exceeding 250 cc but not exceeding 1,000 cc, and 8407.34 for capacities exceeding 1,000 cc. Therefore, if an engine is of the reciprocating spark-ignition type used for vehicle propulsion and has a cylinder capacity of 50 cc or less, it will be classified under this heading.

Within this specific classification, further subdivisions exist to refine the categorization based on the engine's power output. The subcategories are: 8407.31.00.40, which covers engines with a power output less than 746 Watts (W), and 8407.31.00.80, designated for all other engines that meet the criteria but do not fall into the under-746W category. These subcategories allow for more granular statistical tracking and potential tariff differentiation based on the engine's performance capabilities.