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eBay£149.99Visit shop Athena Piston Kit Aluminum Forged For Gas Gas EX 250 KTM Husq 16-23 S5F07800002A
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The Athena 4T Forged Piston (77.96mm) is designed for motocross and off-road riders looking to restore or upgrade their 250cc engine performance. This high-grade forged component offers superior durability and heat resistance compared to stock cast pistons, making it an ideal choice for high-stress competition use. A primary caveat is that this specific 77.96mm size is intended for precision cylinder bores; installers must verify their cylinder clearance specifications before assembly to ensure correct fitment.
| Model Part Number | S5F07800002A |
|---|---|
| Brand | Athena |
No. The 77.96mm bore must match your cylinder specifications perfectly. Your cylinder must be measured and potentially honed by a professional machinist.
Yes, Athena forged piston kits typically include the necessary ring set, the 16mm gudgeon pin, and clips.
Forged pistons are denser and stronger, making them much less likely to crack or fail under the high temperatures and pressures of racing.
Maintain regular oil changes and ensure high-quality air filtration to prevent abrasive debris from reaching the cylinder.
Yes, it provides excellent longevity for casual riding as well as professional racing.
Verify that the piston-to-cylinder clearance was measured correctly; excessive clearance leads to audible noise.
Check ring seating and compression; ensure the air filter is clean, as dirt ingestion causes rapid wear.
To ensure maximum service life, follow these guidelines:
