Wossner 8075D050 Piston Kit - Yamaha YFZ350 Banshee RZ350 RD350 RD400 +0.50mm

Wossner 8075D050 Premium Forged 2-Stroke Piston Kit - +0.50mm Oversize

When your classic Yamaha twin or Banshee ATV requires a cylinder bore and refresh, the Wossner 8075D050 Piston Kit provides the Factory Quality precision needed to restore peak performance. This +0.50mm oversize kit is engineered specifically for cylinders being bored to 64.50mm, ensuring perfect clearances and renewed compression. At Moto-House MX, we provide the high-performance forged components required to keep these legendary 2-stroke engines screaming.

Forged from aerospace-grade aluminum alloy, this piston offers superior structural integrity and heat resistance compared to standard cast pistons—a must for high-performance Banshee builds and RD street bikes. The permanent skirt coating significantly reduces internal friction and piston rock, resulting in a quieter engine and extended service life. With optimized machining for lightness and strength, the 8075D050 is designed to handle the rapid-fire RPMs of Yamaha’s most famous 2-stroke twins.

Top Features: Wossner 8075D050 Piston Kit

• +0.50mm Oversize (64.44mm Piston): Precision-engineered for 64.50mm bores to restore worn cylinders.
• Aerospace Forged Alloy: Premium aluminum construction provides maximum durability for street and off-road racing.
• Permanent Skirt Coating: Minimizes friction and engine noise for smoother operation and efficient break-in.
• Dual-Ring Design: Optimized for a reliable combustion seal and consistent power delivery across the powerband.
• Complete Assembly: Kit includes the forged piston, high-performance rings, wrist pin, and clips.

Expert Pro-Tip: When boring your cylinders for this +0.50mm kit, ensure your machinist has the pistons in hand to verify the final hone to the exact 64.50mm bore specification. For Banshee and RD350 twins, it is highly recommended to replace pistons in pairs to ensure balanced engine performance.

Fitment List

Year Range	Vehicle Brand	Vehicle Model & Notes
1987-2006	Yamaha	YFZ350 Banshee (ATV)
1973-1975, 1984-1985	Yamaha	RD350 / RZ350 (Street)
1981-1983	Yamaha	RD 350 LC (Liquid Cooled)
1976-1979	Yamaha	RD400 (62.00mm Stroke)

Frequently Asked Questions

Q: Is this kit for one cylinder or two?
A: This kit includes the components for one (1) cylinder. For twin-cylinder engines like the Banshee or RD350, you will need to order two kits.

Q: What is the benefit of the forged material over cast?
A: Forged pistons are much denser and stronger than cast pistons, making them far more resistant to the high heat and detonation risks common in modified 2-stroke engines.

Q: Can I use this without boring my cylinder?
A: No, this is an oversize piston (+0.50mm). It requires your cylinder to be bored and honed to 64.50mm to fit correctly.

Recommended Pairings

• Complete Gasket Set: Ensure a total seal during your Yamaha twin-engine rebuild.
• Motorex Cross Power 2T Oil: Premium synthetic protection for high-performance forged pistons.

Restore your Yamaha’s legendary 2-stroke snap today. Buy now at Moto-House MX!

Moto-House MX – Choice of Champions – is located in Clermont/Montverde, FL. The Best Motocross/UTV & ATV Shop in Central Florida. Stop by our local store in Montverde, FL or enjoy lightning-fast shipping across the USA.