ATHENA Tłok P5F0770187008B 250 4T selection B diameter 76,96 mm, with engine upper gasket set fits YAMAHA WR, YZ 250F/250FX 2014-2017

Athena's motorcycle and quad parts offer a quality and reliability option that is comparable to OEM parts, designed to restore or maximize the performance of vehicles of any brand
Parts for Motorcycles, Quads, and Scooters
In the world of motorcycle and quad parts, Athena's wide range of products also includes:
• Engine gaskets in loose or kit form for road bikes, enduro, motocross, and scooters: a wide selection of O-rings, intake manifold gaskets, clutch, etc.
• Cylinder heads are high-quality motorcycle parts for your engine. Whether you are looking for a replacement cylinder or a performance-boosting solution, you will find options that meet your needs.
• Cylinder kits are a complete range designed to maintain the optimal performance of the engine, preventing overheating and ensuring the longevity of your vehicle.
• Pistons from 2-stroke to 4-stroke motorcycle pistons, you will find a line of racing pistons engineered in Italy and subjected to rigorous bench and track testing for high-level performance and reliability.
• Connecting rods, high-quality connecting rods designed to ensure the durability and performance of your engine.
• Clutch friction plates are the parts that ensure a smooth and reliable clutch, regardless of driving conditions.
• Valves are the motorcycle parts that ensure the correct operation of the engine and its optimal performance.
• Variators are an advantage in terms of optimal control of engine power and traction.
• Carburettors are the perfect components for managing the air-fuel mixture in the engine.
• Air filters for a clean air flow, free of impurities inside the engine
• Oil filters for clean engine oil free of contaminants

Depending on the needs and vehicle category, these parts are usually available in two main variants: the standard version, to restore the vehicles to their original performance, and the Race version, designed to increase the performance of your Road or Motocross bike.