Vertex Top End Piston Kit - Yamaha YZ 85
Part number: VTK24370A-1
$139.95
Description
Top End Piston Kit. Includes (Cast Replica Piston Kit, Top End Gasket Kit, & Wrist Pin Bearing). Specifications Cylinder Diameter: 47mm Displacement: 85cc Piston O.D.: 47.45mm Vehicle Fitment Yamaha YZ 85 (2019-2025) Yamaha YZ 85 Big Wheel (2022-2025) Vertex Pistons are precision-engineered for maximum performance and durability. Each kit is manufactured to OEM specifications with premium materials for a perfect fit. Backed by Vertex's quality guarantee.
Specifications
| compression ratio | STD |
|---|---|
| cylinder diameter | 47mm |
| displacement | 85cc |
| part type | Top End Piston Kit |
| piston od | 47.45 |
| vehicle type | Dirt Bike |
Listed vehicle applications
| Year | Make | Model | Notes |
|---|---|---|---|
| 2025 | Yamaha | YZ 85 | Catalog application: 2025 Yamaha YZ 85. Piston OD 47.45 mm; Cylinder 47mm. Top End Piston Kit. Includes (Cast Replica Piston Kit, Top End Gasket Kit, & Wrist Pin Bearing). Source: Vertex Pistons Catalog 1-21-2026. Reviewed 2026-09-23. |
| 2024 | Yamaha | YZ 85 | Catalog application: 2024 Yamaha YZ 85. Piston OD 47.45 mm; Cylinder 47mm. Top End Piston Kit. Includes (Cast Replica Piston Kit, Top End Gasket Kit, & Wrist Pin Bearing). Source: Vertex Pistons Catalog 1-21-2026. Reviewed 2026-09-23. |
| 2023 | Yamaha | YZ 85 | Catalog application: 2023 Yamaha YZ 85. Piston OD 47.45 mm; Cylinder 47mm. Top End Piston Kit. Includes (Cast Replica Piston Kit, Top End Gasket Kit, & Wrist Pin Bearing). Source: Vertex Pistons Catalog 1-21-2026. Reviewed 2026-09-23. |
| 2022 | Yamaha | YZ 85 | Catalog application: 2022 Yamaha YZ 85. Piston OD 47.45 mm; Cylinder 47mm. Top End Piston Kit. Includes (Cast Replica Piston Kit, Top End Gasket Kit, & Wrist Pin Bearing). Source: Vertex Pistons Catalog 1-21-2026. Reviewed 2026-09-23. |
| 2021 | Yamaha | YZ 85 | Catalog application: 2021 Yamaha YZ 85. Piston OD 47.45 mm; Cylinder 47mm. Top End Piston Kit. Includes (Cast Replica Piston Kit, Top End Gasket Kit, & Wrist Pin Bearing). Source: Vertex Pistons Catalog 1-21-2026. Reviewed 2026-09-23. |
| 2020 | Yamaha | YZ 85 | Catalog application: 2020 Yamaha YZ 85. Piston OD 47.45 mm; Cylinder 47mm. Top End Piston Kit. Includes (Cast Replica Piston Kit, Top End Gasket Kit, & Wrist Pin Bearing). Source: Vertex Pistons Catalog 1-21-2026. Reviewed 2026-09-23. |
| 2019 | Yamaha | YZ 85 | Catalog application: 2019 Yamaha YZ 85. Piston OD 47.45 mm; Cylinder 47mm. Top End Piston Kit. Includes (Cast Replica Piston Kit, Top End Gasket Kit, & Wrist Pin Bearing). Source: Vertex Pistons Catalog 1-21-2026. Reviewed 2026-09-23. |
| 2025 | Yamaha | YZ 85 Big Wheel | Catalog application: 2025 Yamaha YZ 85 Big Wheel. Piston OD 47.45 mm; Cylinder 47mm. Top End Piston Kit. Includes (Cast Replica Piston Kit, Top End Gasket Kit, & Wrist Pin Bearing). Source: Vertex Pistons Catalog 1-21-2026. Reviewed 2026-09-23. |
| 2024 | Yamaha | YZ 85 Big Wheel | Catalog application: 2024 Yamaha YZ 85 Big Wheel. Piston OD 47.45 mm; Cylinder 47mm. Top End Piston Kit. Includes (Cast Replica Piston Kit, Top End Gasket Kit, & Wrist Pin Bearing). Source: Vertex Pistons Catalog 1-21-2026. Reviewed 2026-09-23. |
| 2023 | Yamaha | YZ 85 Big Wheel | Catalog application: 2023 Yamaha YZ 85 Big Wheel. Piston OD 47.45 mm; Cylinder 47mm. Top End Piston Kit. Includes (Cast Replica Piston Kit, Top End Gasket Kit, & Wrist Pin Bearing). Source: Vertex Pistons Catalog 1-21-2026. Reviewed 2026-09-23. |
| 2022 | Yamaha | YZ 85 Big Wheel | Catalog application: 2022 Yamaha YZ 85 Big Wheel. Piston OD 47.45 mm; Cylinder 47mm. Top End Piston Kit. Includes (Cast Replica Piston Kit, Top End Gasket Kit, & Wrist Pin Bearing). Source: Vertex Pistons Catalog 1-21-2026. Reviewed 2026-09-23. |
Check the exact vehicle application and specifications before ordering. Ask HPE if a detail is missing.