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Wiseco 7700XU Piston Ring Set - 77.00mm Bore - Fits Yamaha YZ250F, WR250F & Gas Gas EC250F
Wiseco 7700XU Piston Ring Set - 77.00mm Bore - Fits Yamaha YZ250F, WR250F & Gas Gas EC250F
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Restore the performance and efficiency of your 4-stroke engine with this genuine Wiseco 7700XU Replacement Piston Ring Set. These "XU" series rings are engineered for modern high-rpm 4-stroke engines, featuring a high-quality steel alloy construction with a specialized coating to reduce friction and provide an airtight seal for maximum compression.
Features
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Bore Size: 77.00 mm.
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Ring Type: XU Series (High-performance 4-stroke ring set).
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Superior Sealing: Designed to handle high combustion pressures and extreme temperatures.
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Reduced Friction: Advanced coating helps minimize cylinder wall wear while maximizing horsepower.
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Precision Fit: Manufactured to the exact tolerances required for professional-grade engine builds.
⚠️ CRITICAL COMPATIBILITY NOTE:
These rings are designed to fit Wiseco-branded pistons ONLY. They are not compatible with OEM (original equipment) or other aftermarket piston brands. Please verify that your piston dome is stamped with the correct Wiseco part number before installation.
Fitment
This 77.00 mm ring set is the standard replacement for Wiseco pistons in the following models:
| Make | Model | Years |
| Yamaha | YZ250F | 2001 – 2013 |
| Yamaha | WR250F | 2001 – 2013 |
| Gas Gas | EC250F | 2010 – 2015 |
| Yamaha | PZ50 Phazer (Snowmobile) | 2007 – 2017 |
Specifications
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Brand: Wiseco
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MPN: 7700XU
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Weight: 4.0 oz
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Condition: New in original packaging
**📦 We ship to the lower 48 states.
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