Athena's extensive experience gained in supplying the most prestigious O.E.M. motorcycle manufacturers has brought to their R&D technicians the skills necessary to make their exclusive high-quality components. Athena forged pistons offer the best solution in terms of performance, cost and reliability. Compared to cast pistons, Forged pistons are tougher and more durable than cast pistons, and will stand up to the abuse of todays high performance motorcycles. Forged piston kits are made to OEM stock specifications and include piston, rings and wrist pin. Pin dimensions 16x9x38.2, Bore diameter 77.96 mm, Compression Ratio 14.4:1, Compression Height 19.5 mm. Fitment: KTM SX-F 250 16-22 OEM Replacement D.77.96