Polini 50mm Piston Kit (Part #204.0929/C) is a premium Italian-made performance piston designed for scooters equipped with the QMB139 4-stroke engine, including the Kymco Agility 50, Super 8 50, and similar GY6-based 50cc models.
Engineered for maximum reliability and power, this piston delivers improved compression, smoother acceleration, and extended engine life. Perfect for rebuilding or upgrading your engine to an 80cc big-bore configuration, the kit includes everything needed for a complete piston replacement.
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