Vertex Forged Replica Piston Kit - Beta RR 4T 390
Part number: 24387A
$271.95
Description
Forged Replica Piston Kit. Includes (Piston, Ring Set, Wrist Pin & Circlips). Specifications Compression Ratio: 12.48:1 Cylinder Diameter: 88mm Displacement: 390cc Piston O.D.: 87.96mm Vehicle Fitment Beta RR 4T 390 (2016-2024) Beta RR 4T 390 Race (2022-2024) Beta RR-S 4T 390 (2017-2024) Beta RR-S 4T 390 Special Edition (2024) 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 | 12.48:1 |
|---|---|
| cylinder diameter | 88mm |
| displacement | 390cc |
| part type | Forged Replica Piston Kit |
| piston od | 87.96 |
| vehicle type | Dirt Bike |
Listed vehicle applications
| Year | Make | Model | Notes |
|---|---|---|---|
| 2024 | Beta | RR 4T 390 | Catalog application: 2024 Beta RR 4T 390. Piston OD 87.96 mm; Cylinder 88mm. Forged Replica Piston Kit. Includes (Piston, Ring Set, Wrist Pin & Circlips). Source: Vertex Pistons Catalog 1-21-2026. Reviewed 2026-09-23. |
| 2023 | Beta | RR 4T 390 | Catalog application: 2023 Beta RR 4T 390. Piston OD 87.96 mm; Cylinder 88mm. Forged Replica Piston Kit. Includes (Piston, Ring Set, Wrist Pin & Circlips). Source: Vertex Pistons Catalog 1-21-2026. Reviewed 2026-09-23. |
| 2022 | Beta | RR 4T 390 | Catalog application: 2022 Beta RR 4T 390. Piston OD 87.96 mm; Cylinder 88mm. Forged Replica Piston Kit. Includes (Piston, Ring Set, Wrist Pin & Circlips). Source: Vertex Pistons Catalog 1-21-2026. Reviewed 2026-09-23. |
| 2021 | Beta | RR 4T 390 | Catalog application: 2021 Beta RR 4T 390. Piston OD 87.96 mm; Cylinder 88mm. Forged Replica Piston Kit. Includes (Piston, Ring Set, Wrist Pin & Circlips). Source: Vertex Pistons Catalog 1-21-2026. Reviewed 2026-09-23. |
| 2020 | Beta | RR 4T 390 | Catalog application: 2020 Beta RR 4T 390. Piston OD 87.96 mm; Cylinder 88mm. Forged Replica Piston Kit. Includes (Piston, Ring Set, Wrist Pin & Circlips). Source: Vertex Pistons Catalog 1-21-2026. Reviewed 2026-09-23. |
| 2019 | Beta | RR 4T 390 | Catalog application: 2019 Beta RR 4T 390. Piston OD 87.96 mm; Cylinder 88mm. Forged Replica Piston Kit. Includes (Piston, Ring Set, Wrist Pin & Circlips). Source: Vertex Pistons Catalog 1-21-2026. Reviewed 2026-09-23. |
| 2018 | Beta | RR 4T 390 | Catalog application: 2018 Beta RR 4T 390. Piston OD 87.96 mm; Cylinder 88mm. Forged Replica Piston Kit. Includes (Piston, Ring Set, Wrist Pin & Circlips). Source: Vertex Pistons Catalog 1-21-2026. Reviewed 2026-09-23. |
| 2017 | Beta | RR 4T 390 | Catalog application: 2017 Beta RR 4T 390. Piston OD 87.96 mm; Cylinder 88mm. Forged Replica Piston Kit. Includes (Piston, Ring Set, Wrist Pin & Circlips). Source: Vertex Pistons Catalog 1-21-2026. Reviewed 2026-09-23. |
| 2016 | Beta | RR 4T 390 | Catalog application: 2016 Beta RR 4T 390. Piston OD 87.96 mm; Cylinder 88mm. Forged Replica Piston Kit. Includes (Piston, Ring Set, Wrist Pin & Circlips). Source: Vertex Pistons Catalog 1-21-2026. Reviewed 2026-09-23. |
| 2024 | Beta | RR 4T 390 Race | Catalog application: 2024 Beta RR 4T 390 Race. Piston OD 87.96 mm; Cylinder 88mm. Forged Replica Piston Kit. Includes (Piston, Ring Set, Wrist Pin & Circlips). Source: Vertex Pistons Catalog 1-21-2026. Reviewed 2026-09-23. |
| 2023 | Beta | RR 4T 390 Race | Catalog application: 2023 Beta RR 4T 390 Race. Piston OD 87.96 mm; Cylinder 88mm. Forged Replica Piston Kit. Includes (Piston, Ring Set, Wrist Pin & Circlips). Source: Vertex Pistons Catalog 1-21-2026. Reviewed 2026-09-23. |
| 2022 | Beta | RR 4T 390 Race | Catalog application: 2022 Beta RR 4T 390 Race. Piston OD 87.96 mm; Cylinder 88mm. Forged Replica Piston Kit. Includes (Piston, Ring Set, Wrist Pin & Circlips). Source: Vertex Pistons Catalog 1-21-2026. Reviewed 2026-09-23. |
| 2024 | Beta | RR-S 4T 390 | Catalog application: 2024 Beta RR-S 4T 390. Piston OD 87.96 mm; Cylinder 88mm. Forged Replica Piston Kit. Includes (Piston, Ring Set, Wrist Pin & Circlips). Source: Vertex Pistons Catalog 1-21-2026. Reviewed 2026-09-23. |
| 2023 | Beta | RR-S 4T 390 | Catalog application: 2023 Beta RR-S 4T 390. Piston OD 87.96 mm; Cylinder 88mm. Forged Replica Piston Kit. Includes (Piston, Ring Set, Wrist Pin & Circlips). Source: Vertex Pistons Catalog 1-21-2026. Reviewed 2026-09-23. |
| 2022 | Beta | RR-S 4T 390 | Catalog application: 2022 Beta RR-S 4T 390. Piston OD 87.96 mm; Cylinder 88mm. Forged Replica Piston Kit. Includes (Piston, Ring Set, Wrist Pin & Circlips). Source: Vertex Pistons Catalog 1-21-2026. Reviewed 2026-09-23. |
| 2021 | Beta | RR-S 4T 390 | Catalog application: 2021 Beta RR-S 4T 390. Piston OD 87.96 mm; Cylinder 88mm. Forged Replica Piston Kit. Includes (Piston, Ring Set, Wrist Pin & Circlips). Source: Vertex Pistons Catalog 1-21-2026. Reviewed 2026-09-23. |
| 2020 | Beta | RR-S 4T 390 | Catalog application: 2020 Beta RR-S 4T 390. Piston OD 87.96 mm; Cylinder 88mm. Forged Replica Piston Kit. Includes (Piston, Ring Set, Wrist Pin & Circlips). Source: Vertex Pistons Catalog 1-21-2026. Reviewed 2026-09-23. |
| 2019 | Beta | RR-S 4T 390 | Catalog application: 2019 Beta RR-S 4T 390. Piston OD 87.96 mm; Cylinder 88mm. Forged Replica Piston Kit. Includes (Piston, Ring Set, Wrist Pin & Circlips). Source: Vertex Pistons Catalog 1-21-2026. Reviewed 2026-09-23. |
| 2018 | Beta | RR-S 4T 390 | Catalog application: 2018 Beta RR-S 4T 390. Piston OD 87.96 mm; Cylinder 88mm. Forged Replica Piston Kit. Includes (Piston, Ring Set, Wrist Pin & Circlips). Source: Vertex Pistons Catalog 1-21-2026. Reviewed 2026-09-23. |
| 2017 | Beta | RR-S 4T 390 | Catalog application: 2017 Beta RR-S 4T 390. Piston OD 87.96 mm; Cylinder 88mm. Forged Replica Piston Kit. Includes (Piston, Ring Set, Wrist Pin & Circlips). Source: Vertex Pistons Catalog 1-21-2026. Reviewed 2026-09-23. |
| 2024 | Beta | RR-S 4T 390 Special Edition | Catalog application: 2024 Beta RR-S 4T 390 Special Edition. Piston OD 87.96 mm; Cylinder 88mm. Forged Replica Piston Kit. Includes (Piston, Ring Set, Wrist Pin & Circlips). 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.