WISECO 900M05800 GP Series Piston Kit 58mm Yamaha YZ125 2022–2025

WISECO 900M05800 - GP Series Piston Kit 58mm Yamaha YZ125 2022–2025

The WISECO 900M05800 ArmorGlide GP Series piston kit is engineered for endurance, high RPM stability, and consistent performance in Yamaha YZ125 two-stroke engines. Designed as part of the GP Series, this WISECO piston kit 58mm is built to handle sustained high-speed operation while maintaining reliable compression and throttle response, making it ideal for motocross racing, off-road riding, and performance-focused engine maintenance.

Forged and machined in the USA, the WISECO 900M05800GP piston kit 58mm features advanced electra-coating on critical surfaces to reduce wear, resist detonation, and prevent micro-welding under extreme conditions. Reduced external machining helps improve bore sealing for increased compression, while the ArmorGlide® skirt coating minimizes friction and operating noise. This complete piston kit is designed for riders and mechanics who demand durability, precision fitment, and dependable power delivery from their YZ125 engines.

Key Features

• Forged piston engineered for endurance and high RPM operation
• 58.00 mm bore designed specifically for Yamaha YZ125 engines
• Electra-coated dome, ring groove, and pin bore for maximum wear resistance
• Reduced external machining improves bore sealing and compression efficiency
• ArmorGlide® skirt coating reduces friction and operating noise
• Supports increased horsepower potential through reduced drag
• Includes piston, ring(s), wrist pin, and circlips for complete installation
• Engineered, forged, and machined in the USA

Vehicle Fitment

• 2022–2025 Yamaha YZ125
• 2023–2025 Yamaha YZ125X
• 2022–2023, 2025 Yamaha YZ125 Monster Energy Yamaha Racing Edition
• 2024 Yamaha YZ125 Monster Energy Racing Edition
• 2024 Yamaha YZ125 50th Anniversary Edition

Frequently Asked Questions

Is this piston kit compatible with all recent Yamaha YZ125 models?
Yes, this piston kit is designed for the listed Yamaha YZ125 and YZ125X models using a 58.00 mm bore.

What makes the GP Series piston different?
GP Series pistons feature specialized coatings and reduced external machining to improve bore sealing, durability, and high-RPM performance.

Does the kit include all required installation components?
Yes, the kit includes the piston, ring(s), wrist pin, and circlips for a complete top-end piston replacement.

This piston kit is a reliable choice for riders maintaining or upgrading their YZ125 engines, delivering durable performance, precise fitment, and consistent power in demanding riding conditions.

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