For motor cycles
Spark-ignition piston engines up to 50 cc, for motorcycles
HSN 8407 31 10 (spark-ignition reciprocating piston engines of cylinder capacity not exceeding 50 cc, for motorcycles) 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 of larger cylinder capacity, or complete motorcycles, fall under sibling tariff lines within Chapter 84 and Chapter 87 respectively, where compliance obligations may differ.
The principal importer risk at this tariff line is misclassification: engines declared as sub-50 cc parts but found on examination to exceed that displacement, or to be imported as part of a complete or semi-knocked-down vehicle, may be re-classified under a tariff line that does carry compliance — triggering detention pending the relevant clearance and retrospective duty recovery. Verify cylinder displacement and the commercial purpose (standalone replacement part versus vehicle assembly) against the customs tariff before shipment.