The vertex cast big bore piston kit for gas gas ec 250 2021-2025 1.60 Mm is part of the latest collection from vertex.Features: cast-bb â cast piston in original oe form for big bore cylinder all pistons are heat-treated with a t-5 hardening and tempering cycle all piston skirts are coated with a high-tech molybdenum disulphite coating for faster break-in time and increased piston life cast piston kits are gravity-cast aluminum alloy not forged with 18% silicone content, which produces an extremely light but very strong piston big bore pistons increase engineâ s displacement, torque, and peak horsepower replacement two-stroke piston rings sold individually four stroke piston rings sold as a set specifications: bore size: 68.00 Mm compression ratio: standard displacement: 262 cc engine type: 2-stroke piston diameter: 67.95 Mm piston material: aluminum alloy cast piston size: 1.60 Mm product name: piston kit research value: finalized ring material: cast nitride coated steel skirt coating: molybdenum disulphite style: cast big bore to fit: gas gas ec 250 2021 all models gas gas ec 250 2022 all models gas gas ec 250 2023 all models gas gas ec 250 2024 all models gas gas ec 250 2025 all models gas gas ex 250 2022 american models gas gas ex 250 2023 american models gas gas ex 250 2024 american models gas gas mc 250 2022 all models gas gas mc 250 2023 all models gas gas mc 250 2024 all models gas gas mc 250 2025 all models gas gas mc 250 2026 all models husaberg te 250 2011 euro...