Compatible with Keihin PWK carburetors in bore sizes 26 mm, 28 mm, 30 mm, 32 mm, and 34 mm. Designed for 4stroke motorcycles with engine displacement from 50cc to 300cc. Key benefits Stable atomization and efficient airfuel mixing that adapts to engine operating conditions for the correct fuel ratio. Automatic adjustment of airfuel concentration to suit different riding conditions, delivering the appropriate amount of mixed gas. Improves power and torque by providing the right mixture for the engine's needs. Replacement option for old or damaged carburetors. Specifications and compatibility Brand/model alignment: Keihin PWK carburetor family Bore sizes supported: 26 mm, 28 mm, 30 mm, 32 mm, 34 mm Engine type: 4stroke Suitable vehicle range: motorcycles from 50cc up to 300cc What this product does Provides a reliable airfuel mixing solution that maintains efficient combustion across operating conditions. Supports replacement of worn carburetors to restore performance and reliability. Practical use scenarios Scenario 1: Replacing a worn or failing carburetor on a 4stroke motorcycle in the 50cc–300cc range to restore smooth operation and consistent fueling. Scenario 2: Upgrading a bike with a Keihin PWK carburetor to improve atomization stability and achieve dependable power delivery across city and highway riding. Scenario 3: Restoring an older motorcycle by installing a PWKcompatible carburetor that matches common bore sizes (26–34 mm) to maintain original performance while enhancing appearance. Notes Material and construction details are not specified. The description reflects compatibility, function, and performance as indicated by the original product information.