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HSChapter 84
U.S. imports of spark-ignition reciprocating piston engines for vehicles, not over 50 cc (HS 840731) totaled $10K in June 2026, traded with 4 countries.
Spark-Ignition Reciprocating Piston Engines for Vehicles, Not Over 50 cc imports of $10K in June 2026 ran 83% above the year-to-date monthly average of $6K.
At the smallest end of the vehicle engine spectrum, heading 840731 covers spark-ignition reciprocating piston engines with cylinder displacement not exceeding 50 cc, used in mopeds, small scooters, and light utility equipment classified in Chapter 87. The US schedule provides lines for engines at or below 50 cc with output under 746 W (8407310040) and those below 50 cc exceeding 746 W (8407310080). Japan and Germany are leading suppliers, though China is also a notable source — and engines of Chinese origin may be subject to Section 301 tariffs, a key cost consideration for importers of small-displacement powersports components.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
Classification depends on the vehicle type. Heading 840731 covers engines for vehicles of Chapter 87, which includes go-karts (typically heading 8703 or 8704). However, if the engine is designed for a non-road application such as a lawn mower or generator, it would fall under heading 840790 instead. The intended end-use and the vehicle's Chapter 87 classification are the controlling factors.
The two active 10-digit lines under 840731 split on whether rated output is below 746 W (8407310040) or at/above 746 W (8407310080), in addition to the 50 cc displacement ceiling. Importers should obtain manufacturer power-output specifications in watts or horsepower (1 hp ≈ 746 W) to ensure correct line selection, as the distinction affects duty liability.
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| Country | Imports | Exports | Balance |
|---|---|---|---|
| VENEZUELA | -- | $343K | +$343K |
| KOREA, SOUTH | -- | $14K | +$14K |
| GERMANY | $10K | -- | -$10K |
| ISRAEL | -- | $10K | +$10K |
| UNITED ARAB EMIRATES | -- | -- | -- |
Monthly import values over time
HS10 import codes under this HS6 parent, each with its own page. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Import Value | Effective Tariff % | Dutiable Share | Duty Collected |
|---|---|---|---|---|---|
| 8407310080 | SP-IG REC PST ENG FOR PROP VEH CH87 (LT 50CC 746W) | $10K | 10.00% | 100.00% | $1K |
| 8407310040 | SP-IG REC PST ENG FOR PROP VEH CH87 (50CC LT 746W) | $0 | -- | -- | -- |
HS10 export codes under this HS6 parent, each with its own page. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 8407310000 | SPRK-IGN PISTON ENG F VEH OF HDG 87,NOT EXC 50 CC | $367K |
DIGITAL PROCESSING UNITS, N.E.S.O.I.
HS 847150
PARTS & ACCESSORIES FOR ADP MACHINES & UNITS
HS 847330
PORT DIGTL AUTOMATIC DATA PROCESS MACH NOT > 10 KG
HS 847130
AUTOMATIC DATA PROCESSING STORAGE UNITS, N.E.S.O.I
HS 847170
AUTOMATIC DATA PROCESSING UNITS, N.E.S.O.I.
HS 847180
TURBOJET AND TURBOPROLLER PARTS
HS 841191
| Port | Imports | Exports | Balance |
|---|---|---|---|
| MIAMI, FL | -- | $200K | +$200K |
| PORT EVERGLADES, FL | -- | $143K | +$143K |
| ANCHORAGE, AK | -- | $14K | +$14K |