Wossner WO-4091-DB Forged Piston Kit KTM 350 SX-F, KTM 350 XC-F, Husqvarna FC350 and Husqvarna FX350

Wossner WO-4091-DB KTM 350 SX-F/XC-F & Husqvarna FC350/FX350 Forged Piston Kit – 14.6:1 Compression

The Wossner WO-4091-DB Forged Piston Kit is a precision graded piston developed for selected KTM 350 SX-F, KTM 350 XC-F, Husqvarna FC350 and Husqvarna FX350 four-stroke motorcycles. Manufactured from premium forged aluminium alloy, it provides excellent strength, piston stability and durability for demanding motocross and cross-country use.

Featuring an 88.01 mm graded cylinder bore, 87.96 mm piston diameter, 57.50 mm stroke compatibility and a 14.6:1 compression ratio, the WO-4091-DB is intended for accurately measured cylinders requiring the first graded piston size. Its two-ring design, lateral gas ports and permanent skirt coating help provide effective sealing, reduced friction and dependable performance.

• Standard Series forged graded piston kit
• Suitable for KTM 350 SX-F 2023–2027
• Suitable for KTM 350 XC-F 2023–2027
• Suitable for Husqvarna FC350 2023–2026
• Suitable for Husqvarna FX350 2023–2026
• 88.01 mm graded cylinder bore
• 87.96 mm piston diameter
• 0.01 mm graded size
• 57.50 mm stroke compatibility
• 14.6:1 compression ratio
• Two-ring piston design
• Lateral gas ports
• Permanent anti-friction skirt coating
• TPR88.00/2 piston ring set
• WP072-SP wrist pin
• CW18 retaining clips
• Includes piston, rings, wrist pin and retaining clips

Important: Always confirm the motorcycle make, model, year and measured cylinder bore before ordering. This graded piston must be selected according to the measured cylinder diameter to achieve the correct piston-to-cylinder clearance. Professional engine assembly is recommended.

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.