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Engines and Components› Pistons and Piston Rings

Athena

Athena 21-23 GASGAS EX 250 F 77.97mm 4T Forged Piston

$189.95 $152.19 Save $37.76

SKU: A0EF S5F07800002B

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Ships by Aug 8
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Description

Part #: S5F07800002B

Athena, leader in producing motorcycle spare parts for over 40 years, unveils its new range of 4-stroke off-road forged pistons made by reverse extrusion. Produced with cutting-edge CNC machining tools, which ensure dimensional tolerances of less than 0.01 mm, Athena pistons are made of special high-performance materials (nickel, silica, and aluminum alloys) that guarantee the same reliability of the OE piston, while at the same time providing greater resistance and excellent performance. The perfectly smooth profile ensures a regular flow and the perfect flame propagation.

MIA's Description

The Athena forged piston kit is a high-performance engine component designed for 4-stroke off-road motorcycles. It is made from special high-performance materials produced by reverse extrusion forging. The piston features a molybdenum disulfide sinter coating to improve flow, sliding ability, performance, and durability, while reducing friction and noise. It also includes last-generation stainless steel segments with a PVD coating in CrN and wear-resistant reinforcements.

Fitment

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Specifications

BrandAthena
Part NumberA0EF S5F07800002B

Videos

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4 Stroke Motorcycle Cylinder Replacement: Your Complete Guide 🛠️ Honda CRF250R
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NEW PRODUCT Athena Top End Piston Kit - 2T 4T 🆕
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Athena 4-Stroke Cylinder Kit Review by MotoEverything
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How to assemble 4-stroke Off-road pistons & piston rings ❓
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What's New - Athena new off-road Piston line

What's New - Athena new off-road Piston line
Apollo 250RX review 2.0 with Athena big bore kit, 11.9:1 piston, Web 340/402 camshaft, and more

Apollo 250RX review 2.0 with Athena big bore kit, 11.9:1 piston, Web 340/402 camshaft, and more

Buy with Confidence

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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