Yamaha PW50 PW 50 Stock Bore WISECO Piston COMETIC Gaskets Stud Kit Rebuild Kit
Complete Yamaha PW50 top end rebuild kit including 40mm cylinder, cylinder head, Wiseco forged piston, Cometic gasket kit, NGK spark plug, and titanium studs.
1981-2025 Yamaha PW50 Y-Zinger Stock Bore Complete Top End Rebuild Kit Wiseco Piston
📖 Product Description
Restore the legendary reliability of your 1981-2025 Yamaha PW50 Y-Zinger with this premium BPRATV Complete Stock Bore Top End Rebuild Kit. Whether you're refreshing a well-loved trail bike or building a dependable engine for the next generation of riders, this complete package includes everything needed for a professional-quality top end rebuild.
Built using premium components from Wiseco, Cometic, NGK, and BPRATV, this kit features a precision-machined 40mm stock bore cylinder, matching cylinder head, forged Wiseco piston kit, Cometic-manufactured gasket set, Talon Titanium head studs, wrist pin bearing, and NGK spark plug. Every component has been carefully selected to provide exceptional durability, performance, and OEM-quality fitment for your PW50.
🔥 Key Features & Benefits
- BPRATV 40mm stock bore cylinder manufactured for OEM-quality fit and performance
- BPRATV aftermarket cylinder head engineered for reliable combustion sealing
- Wiseco forged 40mm stock bore piston delivers superior strength and longevity over cast pistons
- Wiseco top end gasket kit manufactured by Cometic for dependable sealing
- Wiseco wrist pin bearing included for complete top end service
- BPRATV Talon Titanium head stud kit provides exceptional strength while reducing weight
- NGK spark plug ensures reliable starting and optimum ignition performance
- Complete kit backed by a 1-Year Limited Warranty*
📦 Product Contents
- BPRATV Aftermarket 40mm Stock Bore Cylinder
- BPRATV Aftermarket Cylinder Head
- Wiseco 40mm Stock Bore Forged Piston
- Piston Rings
- Wrist Pin
- Circlips
- Wiseco Top End Gasket Kit (Manufactured by Cometic)
- Wiseco Wrist Pin Bearing
- NGK Spark Plug
- BPRATV Talon Titanium Head Stud Kit
✅ Compatibility
Designed as a direct replacement stock bore top end rebuild kit for:
- 1981-2025 Yamaha PW50
- 1981-2025 Yamaha PW 50
- 1981-2025 Yamaha Y-Zinger
- 40mm Stock Bore
- Direct OEM-style replacement components for hassle-free installation
❓ Frequently Asked Questions
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Q: Is this a complete top end rebuild kit?
A: Yes. This kit includes the cylinder, cylinder head, forged piston, piston rings, wrist pin, circlips, wrist pin bearing, gasket kit, spark plug, and titanium head studs for a complete top end rebuild.
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Q: Is this a stock bore kit?
A: Yes. The included cylinder and Wiseco forged piston feature the original 40mm stock bore size for OEM displacement and dependable performance.
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Q: Why choose a Wiseco forged piston?
A: Wiseco forged pistons offer increased strength, improved heat resistance, and longer service life compared to conventional cast pistons, making them ideal for both recreational and performance riding.
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Q: Does the kit include everything needed to complete the installation?
A: Yes. All major top end components, gaskets, piston hardware, wrist pin bearing, spark plug, and titanium head studs are included to simplify your rebuild.
🌟 Why Buy from BPRATV? Trusted Performance Experts 🌟
At BPRATV, our promise is unwavering: The Best Parts. The Best Performance. The Best Price. We specialize in premium ATV and motocross engine components trusted by riders and builders nationwide. Our kits combine industry leading brands when applicable to deliver reliability and performance you can trust. Trust BPRATV to keep your Yamaha PW50 Y-Zinger running at its best, every single time.
Restore your Yamaha PW50 with premium Wiseco, Cometic, NGK, and BPRATV components--order your complete rebuild kit today!
BPRATV - The Best Parts. The Best Performance. The Best Price.
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© BPRATV LLC 1-year limited warranty from the manufacturer for material or workmanship defects.* Due to the nature of high performance and racing applications, BPRATV LLC components are sold without express warranty or any implied warranty of merchantability or fitness for a specific purpose. BPRATV LLC shall not, under any circumstances, be liable for any specific, incidental or consequential damages, including, but not limited to, damage, or loss of property or equipment, loss of profits or revenue(s), cost of purchased or replacement goods, or claims of customers of the purpose, which may arise and/or shall result from sale, installation or use of these parts. Installation of these parts may void vehicle manufacturers warranty coverage and/or may cause the vehicle to be illegal in some locations.
This product is exempt from the emission standards and related requirements of 40 C.F.R. § 1051 as provided by 40 C.F.R. § 1051.620, and California law [e.g., vehicle code§§ 27156 and 38391]. This product is sold only for use in connection with EPA-certified, purpose-built, nonroad vehicles used solely for closed course, nonroad competition/racing and not used for any recreational purpose or on public highways or right of ways maintained by and open to the public.
