Asaki 66E-11631-00 Standard Size Piston Kit Replacement for Yamaha GP800 XLT800 Power Valve PWC 1998-2005

Premium Standard Size Piston Kit for Yamaha GP800 & XLT800 PWCRestore your personal watercraft's performance with our premium Standard Size Piston Kit. Engineered specifically for Yamaha GP800 and XLT800 power valve engines, this complete drop-in replacement component is designed to restore lost compression, maximize thermal efficiency, and significantly enhance overall engine reliability. Manufactured from high-strength marine-grade alloys, it provides exceptional resistance to saltwater corrosion and thermal fatigue, ensuring peak performance and longevity in harsh aquatic environments.Cross Reference & CompatibilityDirect replacement for OEM Part Number: 66E-11631-00Interchangeable Numbers: 66E-11631-00-89, 66E-11631-00-90, 66E-11631-00-A0, 66E-11631-01-A0, 66E-11631-01-B0, 66E-11631-01-C0, 66E-11631-01-D0, and SBT Number 47-406.Comprehensive Fitment ListFitment Checked: Engineered to match original equipment dimensions for a hassle-free installation on the following Yamaha models:1998 - Wave Runner GP800W (GP800W)1999 - Wave Runner GP800 (GP800X)2000 - Wave Runner GP800 (GP800Y)2000 - Waverunner Metallic Marine Silver (XL800Y)2000 - XL800 (XA800Y)2001 - GP800R (GP800AZ)2001 - XL800 (XA800Z)2002 - GP800R (GP800AA)2002 - XLT800 (XA800AA)2003 - GP800R (GP800AB)2003 - XLT800 (XA800AB)2004 - GP800R (GP800AC)2004 - XLT800 (XA800AC)2005 - GP800R (GP800AD)Please Note: This is a high-quality aftermarket replacement part engineered to meet or exceed OEM grade standards. Any use of brand names or model designations is made solely for the purpose of demonstrating compatibility.

• Compatibility & Cross-Reference: Exact replacement for OEM number 66E-11631-00; Interchangeable with alternate part numbers 66E-11631-00-89, 66E-11631-00-90 and SBT number 47-406; Fits 1998-2005 GP800, GP800R, XL800, and XLT800 models
• Engine Application: Designed specifically for personal watercraft engines to effectively restore factory-level compression, significantly improve thermal efficiency, and enhance the overall operational reliability of your power valve system during high-speed acceleration
• Fitment Checked: Engineered to match original equipment dimensions for a hassle-free installation; This standard size drop-in component ensures precise alignment and immediate integration with your existing marine engine setup
• Material & Durability: Constructed from high-strength material, this kit provides exceptional saltwater corrosion resistance and thermal stability, ensuring peak performance and longevity in harsh aquatic environments
• Product Origin and Import Information: Product made in Taiwan; In accordance with updated U.S. import regulations, taxes, duties, or customs fees if applicable are not included in the listed price