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Honda GX390 Small Engine from Japan

The Honda GX390 is a 389cc spark-ignition reciprocating piston engine rated at 9.3 kW (approximately 13 HP), designed for propulsion in small utility vehicles like go-karts and mini bikes under Chapter 87. It falls under HTS 8407.33.9040 due to its cylinder capacity between 250cc and 1000cc and power output not exceeding 18.65 kW. This classification applies specifically to engines intended for vehicle propulsion rather than stationary power generation.

Duty Rate — Japan → United States

15%

Rate breakdown

9903.94.4315%Parts of passenger vehicles and light trucks that are products of Japan as provided for in subdivision (l) of U.S. note 33 to this subchapter, with an ad valorem (or ad valorem equivalent) rate of duty under column 1 less than 15 percent as provided for in subdivision (m) of U.S. note 33 to this subchapter.
9903.03.060%Articles of aluminum, of steel, or of copper or derivative aluminum or steel articles; passenger vehicles (sedans, sport utility vehicles, crossover utility vehicles, minivans, and cargo vans) and light trucks; parts of passenger vehicles (sedans, sport utility vehicles, crossover utility vehicles, minivans, and cargo vans) and light trucks; medium- and heavy-duty vehicles; parts of medium- and heavy-duty vehicles; wood products; and semiconductor articles, of any country, as provided in subdivision (aa)(v) of U.S. note 2 to this subchapter

Import Tips

Verify engine power rating with manufacturer specs and include propulsion end-use certification for vehicles of Chapter 87; common pitfall is misclassifying as stationary garden equipment

Ensure cylinder capacity documentation matches 250-1000cc range

Obtain EPA/CARB emissions labels for US compliance