Description
The Meteor 125 Piston (54mm) is a premium-quality replacement piston designed for Gas Gas Pro, Racing, and GP 125 (2002–2025) models. Made in Italy by Meteor, a specialist in piston manufacturing since 1952, this piston offers exceptional precision, durability, and reliability for trials applications.
Crafted from a high-strength aluminium alloy, the piston delivers lightweight performance, excellent heat resistance, and smooth, consistent power delivery. Its precise machining guarantees a perfect fit, improving efficiency and extending engine life.
This kit includes the piston, rings, pin, and circlips, providing everything needed for straightforward installation. Available in size codes (A/B/C, etc.), the Meteor piston ensures accurate matching to your cylinder for optimal compression and performance.
Features
- Made in Italy by Meteor – trusted since 1952
- Premium aluminium alloy construction – strong, lightweight, and durable
- Precision-machined for consistent performance and reliability
- Excellent wear resistance and long service life
- Smooth power delivery and improved throttle response
- Complete kit: piston, rings, pin, and circlips included
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Available in A/B/C size codes to match your cylinder
Fitment
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Gas Gas Pro / Racing / GP 125 (2002–2025)
How to Choose the Right Size
Trials engines use pistons in small incremental size codes (A, B, C, D).
- Match the piston size code to your cylinder stamp (e.g. “A” → “A” piston).
- For worn cylinders, step up one code size (A → B → C).
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When all codes are used, the cylinder must be re-plated or replaced.
⚠️ Always check the code stamped on your cylinder before ordering to ensure proper fit and avoid engine damage.
Dimensions
- Standard diameter: 54mm
- Compression height: 29.5mm
- Head type: barrel head
- Head height: 2.7mm
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Total length: 63.2mm
Estimated Weight
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Approx. 145g (piston only)






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