Cd 70 sprocket

For the CD 70 motorcycle, durability is paramount. You should prioritize sprockets made from High-Carbon Steel (e.g., S45C or 1045 steel). Ensure the teeth undergo Induction Hardening to reach a hardness level of HRC 45-50, which significantly reduces wear and tear under high-torque conditions. Avoid low-grade A3 steel as it wears out rapidly, leading to frequent replacements.

The standard configuration for a CD 70 is typically a 14T front sprocket and a 36T or 38T rear sprocket using a 428 chain size. Verify that the mounting hole pitch and center bore diameter match the Honda CD 70 standard (typically a 70mm pitch for the rear). Precision is critical; look for suppliers using CNC machining to ensure a perfect fit and smooth chain engagement, which prevents chain jumping.

Since these parts are exposed to the elements, surface treatment is vital. Common options include Zinc Plating (Silver or Golden), Sandblasting, or Black Phosphating. For premium markets, Electrophoretic coating provides superior rust resistance. Ask for a Salt Spray Test report (at least 24-48 hours) to ensure the product won't rust during sea transit or in humid tropical climates.

Reliable manufacturers should hold ISO 9001:2015 certification for quality management. For automotive components like sprockets, compliance with IATF 16949 is a gold standard, indicating the supplier meets rigorous automotive industry requirements. Always request a Material Analysis Report to confirm the chemical composition of the steel used.

Always request a pre-production sample and conduct a Third-Party Inspection (TPI) before the final balance payment. Focus the inspection on dimensional accuracy (using calipers), tooth profile consistency, and hardness testing. On platforms like Made-in-China.com, look for 'Audited Suppliers' to ensure the factory's production capacity and certifications have been verified by independent agencies like SGS or TÜV Rheinland.

Sprockets are weight-heavy commodities. Negotiate based on raw material price indexes (Steel prices). For bulk orders exceeding 5,000 sets, aim for a 10-15% discount compared to sample pricing. Additionally, negotiate for customized packaging (branded boxes) at no extra cost, which adds significant retail value to your local market.

Sprockets are dense and heavy; therefore, Sea Freight (LCL or FCL) is the only economically feasible method for bulk orders. Ensure the supplier uses strong, moisture-proof packaging, such as oil-paper wrapping inside double-corrugated cartons, and reinforces the shipment on fumigated pallets to prevent damage and facilitate easy unloading at your warehouse.

Utilize Secured Trading Services provided by Made-in-China.com to protect your payment until the goods are shipped. Use Incoterms like FOB (Free On Board) to maintain control over the shipping costs and insurance, and always ensure the Bill of Lading (B/L) descriptions accurately match your purchase order to avoid customs clearance delays.