Wossner 8075D150 Piston Kit - Yamaha YFZ350 Banshee RZ350 RD350 RD400 +1.50mm

Wossner 8075D150 Premium Forged 2-Stroke Piston Kit - +1.50mm Oversize

When your classic Yamaha twin or Banshee ATV requires a significant overbore to restore cylinder health, the Wossner 8075D150 Piston Kit provides the Factory Quality precision needed to bring your engine back to life. This +1.50mm oversize kit is engineered for cylinders being bored to 65.50mm, offering a high-performance solution for renewing compression and power in heavily worn or previously bored engines. At Moto-House MX, we provide the high-performance forged components required to keep these legendary 2-stroke engines performing at their peak.

Forged from aerospace-grade aluminum alloy, this piston offers superior structural integrity and heat resistance compared to standard cast pistons—making it an ideal choice for high-performance Banshee builds and classic 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 8075D150 is designed to handle the high RPMs of Yamaha’s most famous 2-stroke twins.

Top Features: Wossner 8075D150 Piston Kit

• +1.50mm Oversize (65.44mm Piston): Precision-engineered for 65.50mm bores to restore cylinders with significant wear or scoring.
• Aerospace Forged Alloy: Premium aluminum construction provides maximum durability for street, track, 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 +1.50mm kit, ensure your machinist has the pistons in hand to verify the final hone to the exact 65.50mm bore specification. For Banshee and RD350 twins, it is highly recommended to replace pistons in pairs to ensure balanced engine performance and timing.

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 (2) kits.

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

Q: Can I use this without boring my cylinder?
A: No, this is a +1.50mm oversize piston. It requires your cylinder to be professionally bored and honed to 65.50mm 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.