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)

Dispatch Times

Local Stock: Dispatches in < 24 hours

Parts showing as available at our Warehouse in Gorey ship the same business day if ordered before 1pm. 

Supplier Stock: Dispatches in 2-4 Days

Parts showing as available at our Supplier Warehouse are ordered from our supplier and delivered to us before we can dispatch. More info is available on this page under "Stock Availability".

OEM Special Order: Dispatches in 3-10 Days

This website does not have access to live stock levels from our OEM Suppliers. In most cases the parts will be available but in the case of backordered parts we will notify you. We receive parts from Yamaha in 3-4 days, All others including Honda, Suzuki, Kawasaki, Polaris please allow 7-10 days for us to receive the parts. 

Delivery Times

Ireland & Northern Ireland:

1-2 Days using GLS/An Post

Germany, France, Netherlands, Belgium:

3-5 Days using GLS/Fedex

Italy, Spain & Other EU Countries:

4-7 Days using GLS/Fedex