The Harley Davidson 1985-05 Big Twins Compensating Sprocket Sliding Cam 40299-83A is a high-quality steel sprocket designed specifically for Harley-Davidson motorcycles. It is a silver-colored OE/OEM part with the manufacturer part number 40299-83A. This sprocket is compatible with various models from 1985 to 2005, including Big Twins, and is placed in the primary, left, and front positions of the vehicle. This product is a reliable and durable option for motorcycle enthusiasts looking to upgrade or repair their transmission and drivetrain system.