Wossner WO-4014-DB Forged Piston Kit is a Premium Series forged RR-S 390 Enduro
Wossner WO-4014-DB Premium Series Forged Piston Kit for Beta RR-S 390 Enduro (2016–2023) – 87.97 mm
The Wossner WO-4014-DB Forged Piston Kit is a Premium Series graded forged piston engineered for the Beta RR-S 390 Enduro (2016–2023). Manufactured from premium forged aluminium, it is designed for accurately measured cylinders requiring the next piston grade while maintaining exceptional durability and performance. Featuring an 87.97 mm piston diameter for an 88.01 mm graded cylinder bore, a 63.4 mm stroke, 22.5 mm compression height and a 12.7:1 Wossner compression ratio, it provides the correct piston-to-cylinder clearance for precision engine rebuilds. :contentReference[oaicite:2]{index=2}
Precision forged construction and CNC machining ensure excellent strength, accurate fit and dependable sealing. The kit uses the TPR88.00/2 ring set and includes an 18 mm WP072-SP wrist pin with CW18 retaining clips. :contentReference[oaicite:3]{index=3}
- Premium Series forged graded piston kit
- Suitable for Beta RR-S 390 Enduro (2016–2023)
- 88.01 mm graded cylinder bore
- 87.97 mm finished piston diameter
- 0.01 mm graded size
- 12.7:1 Wossner compression ratio
- 12.48:1 OEM compression ratio
- 63.4 mm stroke compatibility
- 22.5 mm compression height
- TPR88.00/2 ring set
- 18 mm WP072-SP wrist pin
- CW18 retaining clips
- Includes piston, piston rings, wrist pin and retaining clips
Important: Always confirm your motorcycle make, model, year and cylinder measurements before ordering. The 87.97 mm graded piston must be selected according to the measured cylinder bore and specified piston-to-cylinder clearance.
Notice: Product images may differ from the actual product. Images are provided for illustration purposes only and may show a representative item rather than the exact part supplied.