Other
Spark-ignition piston engines, 250 cc to 1,000 cc displacement, other
HSN 8407 33 90 (spark-ignition reciprocating or rotary internal combustion piston engines of a cylinder capacity exceeding 250 cc but not exceeding 1,000 cc — other) is not covered by a Bureau of Indian Standards Quality Control Order and carries no Partner Government Agency clearance requirement at the tariff-line level. Import follows the standard customs procedure: Importer-Exporter Code, bill of entry, commercial invoice, packing list. Engines intended for use in specific end-products — such as two- or three-wheeled vehicles — may be separately classified or may trigger compliance requirements at the finished-goods level under Chapter 87.
The absence of product-specific compliance at this tariff line does not foreclose regulatory obligations arising from the engine's intended application: engines integrated into vehicles, generating sets, or other machinery may attract BIS or environmental compliance at the finished-product or end-use level. Customs re-classification — whether to a more specific engine tariff line or to a vehicle-parts heading under Chapter 87 — carries retrospective duty and compliance consequences, including detention pending resolution. Importers should document the engine's exact displacement, application, and end-use before filing the bill of entry.