Wiseco PK1159 Top End Kit 40.50mm Forged Piston Yamaha PW50 1985-2025

Ready to bring your PW50 back to life? The Wiseco PK1159 Forged Series Top End Kit Yamaha PW50 is the ultimate rebuild solution for parents, racers, and riders who demand reliability and performance from their mini bike.

Wiseco has been a trusted name in powersports for decades, and this kit shows why. Forged from premium aluminum right here in the USA, the Wiseco PK1159 Top End Kit Yamaha PW50 is designed specifically for the little two-stroke legend. Dedicated forgings and precision machining deliver the perfect strength-to-weight ratio, giving your PW50 more durability, longer life, and a performance edge.

This is not just a piston—it’s a complete top end rebuild kit. The package includes a forged 40.50mm piston, ring set, wrist pin, circlips, bearing, and gaskets—everything you need for a full refresh in one box. Whether you’re restoring a 1985 PW50 or keeping a 2025 model running strong, this kit has you covered.

💥 Key Features of Wiseco PK1159 Top End Kit Yamaha PW50:

• Fits Yamaha PW50 (1985–2025)
• Forged from high-strength aluminum alloy for max durability
• Optimized strength-to-weight ratio = reliable performance
• Complete kit: piston, rings, wrist pin, circlips, bearing & gaskets
• Designed and manufactured in the USA
• Engineered for 2-stroke efficiency, power, and longevity

Why risk cheap aftermarket kits that wear out quickly? Stick with Wiseco PK1159 Forged Top End Kit Yamaha PW50 and give your mini the same quality trusted by championship riders around the world.

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❓ FAQ

Q: What bore size is this piston kit?
A: The Wiseco PK1159 includes a 40.50mm forged piston designed for PW50.

Q: Does this kit include gaskets?
A: Yes! This is a complete top end kit—piston, rings, wrist pin, circlips, bearing, and gaskets are all included.

Q: Will this fit all PW50 years?
A: Yes, it’s designed to fit Yamaha PW50 models from 1985 through 2025.

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Yamaha PW50 Performance Parts and Accessories

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