Wossner forged pro series piston kit with a 100.01mm bore (99.95mm actual) is designed for the Honda XR650R (2000-2007). Engineered for strength and optimal heat transfer, the piston features an elliptical design that ensures even load distribution, reducing localized pressure and preventing piston collapse. Manufactured in Germany, this piston offers an increased compression ratio of 11.00:1 compared to the OEM 10.00:1.

Features

• Forged construction for durability and high performance


• Optimized heat transfer to cylinder walls for improved efficiency


• Elliptical design ensures uniform bearing surface and prevents piston collapse


• Manufactured in Germany for high-quality standards


• Higher compression ratio (11.00:1) for improved engine performance

Specifications

• Bore Size: 100.01mm (99.95mm actual)


• Display (Displacement): 644 cm³


• Stroke: 82.60mm


• Clearance: 0.06mm


• Compression Ratio: 11.00:1 (OEM: 10.00:1)


• Dome Volume: -1.20 cm³


• Compression Height: 29.00mm


• Theoretical Weight: 374.00g

Cross-Reference OEM Part Numbers

• Piston Kit: 8718DB


• Lock: CW23


• Pin: WP024


• Ring Set: 1000XSY

Vehicle Fitments

• Honda XR650R (2000-2007)