Piston Kit 99-08 Trx Xr 89.00, Forged Wossner 8702D400 400

The Wossner 89mm Bore Piston Kit (Part No. 8702D400) is a high-performance forged piston designed for Honda TRX400EX and TRX400X models. Built for superior strength and durability, it enhances heat transfer within the combustion chamber and features an elliptical design for even load distribution, preventing piston collapse. Manufactured in Germany, this piston kit offers a compression ratio of 12.5:1 for improved engine performance.

Features

• High-strength forged piston construction
• Optimized heat transfer for better combustion efficiency
• Elliptical design for uniform bearing surface expansion
• Manufactured in Germany

Specifications

• Bore Size: 89mm
• Actual Bore Diameter: 88.94mm
• Compression Ratio: 12.5:1
• OEM Compression Ratio: 10.0:1
• Displacement: 397cc
• Stroke: 70.00mm
• Clearance: 0.06mm
• Dome Volume: +8.40cm³
• Compression Height: 26.20mm

Cross-Reference OEM Part Numbers

• Lock P/N: CW20
• Pin P/N: WP052
• Ring Set P/N: 890XSY
• Rod P/N: P4021

Vehicle Fitments

• Honda TRX400EX (1999-2008)
• Honda TRX400X (2009-2012)

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