Athena 20-24 Yamaha WR 250 F 85mm Bore 300cc Big Bore Cylinder Kit

The nickel-silicon coating on this Athena cylinder kit is a notable detail, developed by Athena to offer both a smooth surface and excellent wear resistance. This is a big bore kit designed to increase the displacement of your 2020-2024 Yamaha WR 250 F from its stock 250cc up to 300cc, using an 85mm bore. Athena has been developing aftermarket cylinder parts for over a decade, with their R&D department in Italy handling the design and testing of each component.

Increasing your engine's displacement with a big bore kit like this can lead to improved torque and overall power output. The motor-nicksil coating is key here; it's engineered to handle the increased stresses and heat generated by a larger displacement engine, ensuring durability and consistent performance over time. This kit is a significant upgrade for riders looking to extract more performance from their WR 250 F, whether for trail riding or competition.

When installing a big bore kit, it's important to ensure all other engine components are in good working order to support the increased power. Refer to the manufacturer's installation instructions for specific details regarding assembly and break-in procedures. Please note that this kit is not CARB approved and cannot be shipped to California.