Yamaha Genuine TDM850 43T Rear Sprocket 4TX-25443-40

Product Description Genuine Yamaha factory replacement rear driven sprocket. Manufactured from high-strength hardened steel with precision-hobbed 43-tooth profiles designed to minimize chain friction, reduce wear elongation on the drive chain, and transfer power efficiently from the transmission countershaft. Built to exact factory metallurgy standards and concentricity tolerances to prevent runout and vibration during high-speed final drive operation. Vehicle Compatibility Engineered explicitly for the Yamaha TDM850 liquid-cooled 4-stroke parallel-twin sport-touring platform. Verified catalog fitment layout: Make Model Family Engine Type / Displacement Model Years Yamaha TDM850 (4TX Framework) 849cc (Liquid-Cooled 4-Stroke Parallel-Twin) 1999–2001 Fitment & Technical Details Direct OEM bolt-on replacement component. Installation requires removing the rear wheel assembly, unbolting the old sprocket from the rear wheel cush drive hub, and inspecting the hub cushioning dampers and fastening studs for wear or thread stretching. Always install new self-locking nuts or use high-strength threadlocker on the sprocket studs. Torque all retaining fasteners evenly in a criss-cross pattern to factory workshop specifications, and verify final drive chain alignment and tension post-installation. Important: Please ensure the part number matches your motorbike before purchasing. If you have any questions about the part or its compatibility, feel free to contact us. We’re here to help! At Dmmotorcycles, we’ve specialized in vintage and vintage sports motorcycles and parts directly from Japan since 1998. We stock a wide selection of rare genuine and high-quality aftermarket parts and continually update our inventory to meet growing demand. Looking for a specific part? Don’t hesitate to ask! We may have it in stock even if it’s not listed online. If not, we’ll do our best to source it for you. We’re also happy to provide guidance on installation and offer excellent after-sales support to ensure your satisfaction. Shipping Information We ship worldwide, carefully inspecting and securely packing all parts to ensure safe delivery. Your order will be insured and shipped quickly, with the best available shipping option chosen for speed and reliability. Please note: All parts are shipped from Cyprus (Europe). Customers outside the EU may incur additional import taxes based on the value of the item.