428h motorcycle chain

The '428' refers to the pitch (4/8 inch) and width, while the 'H' stands for Heavy Duty, indicating thicker side plates for higher tensile strength. You must verify the tensile strength (typically ≥20.6kN for 428H) and the material grade, such as 20CrMnTi or 40Mn steel. Ensure the chain uses seamless rollers and bushings to reduce friction and extend the service life of the sprocket assembly.

Request a salt spray test report to evaluate corrosion resistance and a hardness test report (HRC) for the pins and rollers. A high-quality 428H chain should undergo shot-peening treatment to increase fatigue resistance. For premium applications, look for O-ring or X-ring seals which retain internal lubrication, significantly increasing the maintenance interval compared to standard bush chains.

Suppliers should strictly adhere to ISO 10190:2008 (Motorcycle chains - Characteristics and test methods) or ANSI standards. If you are importing into the EU, ensure the manufacturer follows REACH regulations regarding chemical substances in lubricants. ISO 9001 certification is a baseline requirement to ensure consistent manufacturing processes across large batches.

The 428H chain is widely used in 125cc to 200cc motorcycles, including commuters, dirt bikes, and small cruisers. Maintenance involves cleaning and lubrication every 500-1,000 km depending on environmental conditions. For B2B buyers, offering pre-stretched chains is a major selling point as it reduces the need for frequent adjustments immediately after installation.

Always utilize Third-Party Inspection services (like SGS or Intertek) to perform a random chemical analysis of the steel before the balance payment is made. On Made-in-China.com, prioritize Audited Suppliers who have had their manufacturing facilities and quality control systems verified by independent experts.

Focus on Total Cost of Ownership (TCO) rather than just the unit price. Negotiate for customized packaging (OEM) that includes your branding and installation guides, which adds retail value. For long-term partnerships, request a price sliding scale where the unit cost drops as your annual cumulative volume increases.

Motorcycle chains are heavy and prone to oxidation. Ensure the supplier uses VCI (Volatile Corrosion Inhibitor) bags or anti-rust oil coating for each unit. For sea freight, specify heavy-duty double-corrugated export cartons and palletization with plastic wrap to prevent moisture ingress and structural damage during transit.

Use Secured Payment services provided by reputable platforms like Made-in-China.com to ensure funds are only released upon confirmation of shipment. Avoid direct wire transfers to private accounts; always ensure the beneficiary name matches the company name on the business license and the Proforma Invoice.