Classic Forged 2-stroke pistons are perfect for those looking to rebuild their 2-stroke engine with reliable, high-quality components. These pistons cover a wide range of Powersports rebuilds, including vintage motocross models, classic street bikes, and snowmobiles. The forged material improves tensile strength over cast pistons, ensuring refreshed performance on the track or the trail.
Construction: Wiseco 2 Stroke Forged Series Piston Kit - Yamaha YZ 400 ,IT 400
Features
- Dedicated forgings and additional lightening operations allow for optimized strength-to-weight ratio
- Improved tensile strength of forged material optimizes strength and service life
- Designed and built for each specific 2-stroke powersports engine
- Includes high-quality piston ring(s), wrist pin(s), and circlips
- Engineered, forged, and machined in the USA in Mentor, OH
Fitment
Wiseco Yamaha YZ 400 77-78/IT 40077-78 3366TD Piston Kit
Manufacturer part number: 394M08550
Turn 14 part number: wis394M08550
Yes
![Wiseco Piston Kit with Gaskets - 68.00 mm - Yamaha WR/YZ 250 [PK1563]](https://cdn11.bigcommerce.com/s-2wrnp2lk/images/stencil/500x659/products/120705/130632/9FED0D52-2B19-4A33-A6E7-1AC6C03B5F9F__90114.1786950195.png?c=2 "Wiseco Piston Kit with Gaskets - 68.00 mm - Yamaha WR/YZ 250 [PK1563]")