U.S. imports of Reciprocating Piston Engines, Cylinder Capacity Not Exceeding 1,000 cc (SITC 71321) totaled $42.9M in August 2026, imported from 20 countries.
Importers of Reciprocating Piston Engines, Cylinder Capacity Not Exceeding 1,000 cc paid $1.9M in duties in August 2026, an average duty rate of 4.76% — duty actually collected as a share of the imports that cleared customs, not the published tariff schedule.
Last updated: August 2026 dataSmall-displacement reciprocating piston engines — those with cylinder capacity at or below 1,000 cc — are widely used in motorcycles, small passenger vehicles, power equipment, and light utility machinery. Classification at this displacement threshold is critical because it determines duty treatment and separates these engines from their larger-displacement counterparts under SITC 71322. Importers should verify displacement documentation carefully, as engine capacity is the sole classification criterion and misclassification between the two displacement bands is a common audit finding.
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404 import shipments a month
Cylinder capacity is the total swept volume of all cylinders, typically expressed in cubic centimeters (cc) and stated in the manufacturer's technical specification sheet or engine data plate. Importers should retain the original manufacturer's spec sheet and any test certificates to substantiate the declared displacement at entry, since customs may request verification when the figure is close to the 1,000 cc threshold.
No. Engines at or below 1,000 cc and those exceeding 1,000 cc fall under different SITC codes and corresponding HTS subheadings, each with its own duty rate and statistical reporting requirement. Mixed shipments must be declared on separate line items with quantities and values allocated by displacement band.
Basic heading 251 of 642 in section 7
Basic heading 71321 · $42.9M of $172.0B
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ImportsExports
Imports
$42.9MYoY · free account
Exports
$3.7MYoY · free account
12-mo low · imports
Low · free accountOver the twelve months to August 2026, the U.S. imported $494.9M of Reciprocating Piston Engines, Cylinder Capacity Not Exceeding 1,000 cc.
Through August 2026 · exports 10 of 12 months reported. Source: U.S. Census Bureau.
Imports · August 2026
origin
Japan and Mexico together supply 96% of it. China pays 45.7% duty; Mexico 1.4%.
customs district
Census does not publish district detail for this classification system.
destination
Census does not publish state detail for this classification system.
entry
Census does not publish port detail for this classification system.