Selecting a motorcycle drive belt factory requires more than comparing belt size, samples, and unit price. Importers should verify dimensional tolerances, measurement methods, tensile-cord construction, material control, wear and endurance testing, test-report content, lot traceability, and production consistency. This guide explains how to audit a CVT belt supplier, identify weak quality evidence, structure sample approval, and prepare an RFQ that reduces fitment, repeat-order, and post-shipment quality risks.