Piston Kit 99-06 TRX350 78.50, Forged Piston Wossner 8871DA 13101-HN5-670, Honda ATV

The Wossner 8871DA Piston Kit is designed as a high-performance replacement for the Honda TRX350 Rancher (1999-2006) with a bore size of 78.50mm and a clearance of 0.05mm. Wossner forged pistons are engineered for superior strength and efficient heat transfer, reducing localized pressure and evenly distributing thrust loads to prevent piston collapse. Manufactured in Germany, these pistons feature an elliptically designed structure for improved performance and durability.

Features

• Forged piston design for increased strength and longevity
• Optimized heat transfer for efficient combustion
• Elliptical shape for even load distribution and reduced piston collapse
• Manufactured in Germany for high-quality engineering

Specifications

• Bore Size: 78.50mm
• Bore Clearance: 0.05mm
• Display (cm³): 329
• Stroke: 68.00mm
• Compression Height: 24.30mm
• Dome Volume: +1.50cm³
• Wossner Compression Ratio: OEM
• OEM Compression Ratio: 8.80:1

Included Components

• Wossner 78.50mm piston (Part # 8871DA)
• Ring set (Part # 785XDS)
• C-clip set (Part # CW17)
• Wrist pin (Part # WP090)

Cross-Reference OEM Part Numbers

• 13101-HN5-670
• 4933M07850
• 01.1480.000

Additional Cross-Reference Numbers

• Namura NA-10007
• ProX 01.1480.000
• Riken Ring Set (STD): 13010-HN5-671 / 13010-HN5-672

Vehicle Fitments

• Honda TRX350 Rancher (1999-2006)