Vertex Cast Big Bore Piston Kit - Fantic Motor XX 250
Part number: 24079B
$274.95
Description
+5.6mm Cast Big Bore Piston Kit. 72mm. 295cc. Includes (Piston, Rings, Wrist Pin, & Circlips). Shorter wrist pin to crown height for big bore cylinder. *Must modify cylinder bore, cylinder head surface and cylinder head. Specifications Cylinder Diameter: 72mm Displacement: 295cc Piston O.D.: 71.95mm Size Over Standard: 5.6mm Vehicle Fitment Fantic Motor XX 250 (2022-2025) Yamaha YZ 250 (1999-2025) 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 | 72mm |
| displacement | 295cc |
| part type | Cast Big Bore Piston Kit |
| piston od | 71.95 |
| size over std | 6mm |
| vehicle type | Dirt Bike |
Listed vehicle applications
| Year | Make | Model | Notes |
|---|---|---|---|
| 2025 | Fantic Motor | XX 250 | Vertex application: Fantic Motor XX 250, 2022-2025. Part 24079B: +5.6mm Cast Big Bore Piston Kit. 72mm. 295cc. Includes (Piston, Rings, Wrist Pin, & Circlips). Shorter wrist pin to crown height for big bore cylinder. *Must modify cylinder bore, cylinder head surface and cylinder head. Cylinder diameter: 72mm. Size over standard: +5.6mm. Piston OD: 71.95mm. Compression ratio: STD. Displacement with big bore kit: 295cc. Match the exact big bore piston specification; this is not a standard-bore replacement. |
| 2024 | Fantic Motor | XX 250 | Vertex application: Fantic Motor XX 250, 2022-2025. Part 24079B: +5.6mm Cast Big Bore Piston Kit. 72mm. 295cc. Includes (Piston, Rings, Wrist Pin, & Circlips). Shorter wrist pin to crown height for big bore cylinder. *Must modify cylinder bore, cylinder head surface and cylinder head. Cylinder diameter: 72mm. Size over standard: +5.6mm. Piston OD: 71.95mm. Compression ratio: STD. Displacement with big bore kit: 295cc. Match the exact big bore piston specification; this is not a standard-bore replacement. |
| 2023 | Fantic Motor | XX 250 | Vertex application: Fantic Motor XX 250, 2022-2025. Part 24079B: +5.6mm Cast Big Bore Piston Kit. 72mm. 295cc. Includes (Piston, Rings, Wrist Pin, & Circlips). Shorter wrist pin to crown height for big bore cylinder. *Must modify cylinder bore, cylinder head surface and cylinder head. Cylinder diameter: 72mm. Size over standard: +5.6mm. Piston OD: 71.95mm. Compression ratio: STD. Displacement with big bore kit: 295cc. Match the exact big bore piston specification; this is not a standard-bore replacement. |
| 2022 | Fantic Motor | XX 250 | Vertex application: Fantic Motor XX 250, 2022-2025. Part 24079B: +5.6mm Cast Big Bore Piston Kit. 72mm. 295cc. Includes (Piston, Rings, Wrist Pin, & Circlips). Shorter wrist pin to crown height for big bore cylinder. *Must modify cylinder bore, cylinder head surface and cylinder head. Cylinder diameter: 72mm. Size over standard: +5.6mm. Piston OD: 71.95mm. Compression ratio: STD. Displacement with big bore kit: 295cc. Match the exact big bore piston specification; this is not a standard-bore replacement. |
| 2025 | Yamaha | YZ 250 | Vertex application: Yamaha YZ 250, 1999-2025. Part 24079B: +5.6mm Cast Big Bore Piston Kit. 72mm. 295cc. Includes (Piston, Rings, Wrist Pin, & Circlips). Shorter wrist pin to crown height for big bore cylinder. *Must modify cylinder bore, cylinder head surface and cylinder head. Cylinder diameter: 72mm. Size over standard: +5.6mm. Piston OD: 71.95mm. Compression ratio: STD. Displacement with big bore kit: 295cc. Match the exact big bore piston specification; this is not a standard-bore replacement. |
| 2024 | Yamaha | YZ 250 | Vertex application: Yamaha YZ 250, 1999-2025. Part 24079B: +5.6mm Cast Big Bore Piston Kit. 72mm. 295cc. Includes (Piston, Rings, Wrist Pin, & Circlips). Shorter wrist pin to crown height for big bore cylinder. *Must modify cylinder bore, cylinder head surface and cylinder head. Cylinder diameter: 72mm. Size over standard: +5.6mm. Piston OD: 71.95mm. Compression ratio: STD. Displacement with big bore kit: 295cc. Match the exact big bore piston specification; this is not a standard-bore replacement. |
| 2023 | Yamaha | YZ 250 | Vertex application: Yamaha YZ 250, 1999-2025. Part 24079B: +5.6mm Cast Big Bore Piston Kit. 72mm. 295cc. Includes (Piston, Rings, Wrist Pin, & Circlips). Shorter wrist pin to crown height for big bore cylinder. *Must modify cylinder bore, cylinder head surface and cylinder head. Cylinder diameter: 72mm. Size over standard: +5.6mm. Piston OD: 71.95mm. Compression ratio: STD. Displacement with big bore kit: 295cc. Match the exact big bore piston specification; this is not a standard-bore replacement. |
| 2022 | Yamaha | YZ 250 | Vertex application: Yamaha YZ 250, 1999-2025. Part 24079B: +5.6mm Cast Big Bore Piston Kit. 72mm. 295cc. Includes (Piston, Rings, Wrist Pin, & Circlips). Shorter wrist pin to crown height for big bore cylinder. *Must modify cylinder bore, cylinder head surface and cylinder head. Cylinder diameter: 72mm. Size over standard: +5.6mm. Piston OD: 71.95mm. Compression ratio: STD. Displacement with big bore kit: 295cc. Match the exact big bore piston specification; this is not a standard-bore replacement. |
| 2021 | Yamaha | YZ 250 | Vertex application: Yamaha YZ 250, 1999-2025. Part 24079B: +5.6mm Cast Big Bore Piston Kit. 72mm. 295cc. Includes (Piston, Rings, Wrist Pin, & Circlips). Shorter wrist pin to crown height for big bore cylinder. *Must modify cylinder bore, cylinder head surface and cylinder head. Cylinder diameter: 72mm. Size over standard: +5.6mm. Piston OD: 71.95mm. Compression ratio: STD. Displacement with big bore kit: 295cc. Match the exact big bore piston specification; this is not a standard-bore replacement. |
| 2020 | Yamaha | YZ 250 | Vertex application: Yamaha YZ 250, 1999-2025. Part 24079B: +5.6mm Cast Big Bore Piston Kit. 72mm. 295cc. Includes (Piston, Rings, Wrist Pin, & Circlips). Shorter wrist pin to crown height for big bore cylinder. *Must modify cylinder bore, cylinder head surface and cylinder head. Cylinder diameter: 72mm. Size over standard: +5.6mm. Piston OD: 71.95mm. Compression ratio: STD. Displacement with big bore kit: 295cc. Match the exact big bore piston specification; this is not a standard-bore replacement. |
| 2019 | Yamaha | YZ 250 | Vertex application: Yamaha YZ 250, 1999-2025. Part 24079B: +5.6mm Cast Big Bore Piston Kit. 72mm. 295cc. Includes (Piston, Rings, Wrist Pin, & Circlips). Shorter wrist pin to crown height for big bore cylinder. *Must modify cylinder bore, cylinder head surface and cylinder head. Cylinder diameter: 72mm. Size over standard: +5.6mm. Piston OD: 71.95mm. Compression ratio: STD. Displacement with big bore kit: 295cc. Match the exact big bore piston specification; this is not a standard-bore replacement. |
| 2018 | Yamaha | YZ 250 | Vertex application: Yamaha YZ 250, 1999-2025. Part 24079B: +5.6mm Cast Big Bore Piston Kit. 72mm. 295cc. Includes (Piston, Rings, Wrist Pin, & Circlips). Shorter wrist pin to crown height for big bore cylinder. *Must modify cylinder bore, cylinder head surface and cylinder head. Cylinder diameter: 72mm. Size over standard: +5.6mm. Piston OD: 71.95mm. Compression ratio: STD. Displacement with big bore kit: 295cc. Match the exact big bore piston specification; this is not a standard-bore replacement. |
| 2017 | Yamaha | YZ 250 | Vertex application: Yamaha YZ 250, 1999-2025. Part 24079B: +5.6mm Cast Big Bore Piston Kit. 72mm. 295cc. Includes (Piston, Rings, Wrist Pin, & Circlips). Shorter wrist pin to crown height for big bore cylinder. *Must modify cylinder bore, cylinder head surface and cylinder head. Cylinder diameter: 72mm. Size over standard: +5.6mm. Piston OD: 71.95mm. Compression ratio: STD. Displacement with big bore kit: 295cc. Match the exact big bore piston specification; this is not a standard-bore replacement. |
| 2016 | Yamaha | YZ 250 | Vertex application: Yamaha YZ 250, 1999-2025. Part 24079B: +5.6mm Cast Big Bore Piston Kit. 72mm. 295cc. Includes (Piston, Rings, Wrist Pin, & Circlips). Shorter wrist pin to crown height for big bore cylinder. *Must modify cylinder bore, cylinder head surface and cylinder head. Cylinder diameter: 72mm. Size over standard: +5.6mm. Piston OD: 71.95mm. Compression ratio: STD. Displacement with big bore kit: 295cc. Match the exact big bore piston specification; this is not a standard-bore replacement. |
| 2015 | Yamaha | YZ 250 | Vertex application: Yamaha YZ 250, 1999-2025. Part 24079B: +5.6mm Cast Big Bore Piston Kit. 72mm. 295cc. Includes (Piston, Rings, Wrist Pin, & Circlips). Shorter wrist pin to crown height for big bore cylinder. *Must modify cylinder bore, cylinder head surface and cylinder head. Cylinder diameter: 72mm. Size over standard: +5.6mm. Piston OD: 71.95mm. Compression ratio: STD. Displacement with big bore kit: 295cc. Match the exact big bore piston specification; this is not a standard-bore replacement. |
| 2014 | Yamaha | YZ 250 | Vertex application: Yamaha YZ 250, 1999-2025. Part 24079B: +5.6mm Cast Big Bore Piston Kit. 72mm. 295cc. Includes (Piston, Rings, Wrist Pin, & Circlips). Shorter wrist pin to crown height for big bore cylinder. *Must modify cylinder bore, cylinder head surface and cylinder head. Cylinder diameter: 72mm. Size over standard: +5.6mm. Piston OD: 71.95mm. Compression ratio: STD. Displacement with big bore kit: 295cc. Match the exact big bore piston specification; this is not a standard-bore replacement. |
| 2013 | Yamaha | YZ 250 | Vertex application: Yamaha YZ 250, 1999-2025. Part 24079B: +5.6mm Cast Big Bore Piston Kit. 72mm. 295cc. Includes (Piston, Rings, Wrist Pin, & Circlips). Shorter wrist pin to crown height for big bore cylinder. *Must modify cylinder bore, cylinder head surface and cylinder head. Cylinder diameter: 72mm. Size over standard: +5.6mm. Piston OD: 71.95mm. Compression ratio: STD. Displacement with big bore kit: 295cc. Match the exact big bore piston specification; this is not a standard-bore replacement. |
| 2012 | Yamaha | YZ 250 | Vertex application: Yamaha YZ 250, 1999-2025. Part 24079B: +5.6mm Cast Big Bore Piston Kit. 72mm. 295cc. Includes (Piston, Rings, Wrist Pin, & Circlips). Shorter wrist pin to crown height for big bore cylinder. *Must modify cylinder bore, cylinder head surface and cylinder head. Cylinder diameter: 72mm. Size over standard: +5.6mm. Piston OD: 71.95mm. Compression ratio: STD. Displacement with big bore kit: 295cc. Match the exact big bore piston specification; this is not a standard-bore replacement. |
| 2011 | Yamaha | YZ 250 | Vertex application: Yamaha YZ 250, 1999-2025. Part 24079B: +5.6mm Cast Big Bore Piston Kit. 72mm. 295cc. Includes (Piston, Rings, Wrist Pin, & Circlips). Shorter wrist pin to crown height for big bore cylinder. *Must modify cylinder bore, cylinder head surface and cylinder head. Cylinder diameter: 72mm. Size over standard: +5.6mm. Piston OD: 71.95mm. Compression ratio: STD. Displacement with big bore kit: 295cc. Match the exact big bore piston specification; this is not a standard-bore replacement. |
| 2010 | Yamaha | YZ 250 | Vertex application: Yamaha YZ 250, 1999-2025. Part 24079B: +5.6mm Cast Big Bore Piston Kit. 72mm. 295cc. Includes (Piston, Rings, Wrist Pin, & Circlips). Shorter wrist pin to crown height for big bore cylinder. *Must modify cylinder bore, cylinder head surface and cylinder head. Cylinder diameter: 72mm. Size over standard: +5.6mm. Piston OD: 71.95mm. Compression ratio: STD. Displacement with big bore kit: 295cc. Match the exact big bore piston specification; this is not a standard-bore replacement. |
| 2009 | Yamaha | YZ 250 | Vertex application: Yamaha YZ 250, 1999-2025. Part 24079B: +5.6mm Cast Big Bore Piston Kit. 72mm. 295cc. Includes (Piston, Rings, Wrist Pin, & Circlips). Shorter wrist pin to crown height for big bore cylinder. *Must modify cylinder bore, cylinder head surface and cylinder head. Cylinder diameter: 72mm. Size over standard: +5.6mm. Piston OD: 71.95mm. Compression ratio: STD. Displacement with big bore kit: 295cc. Match the exact big bore piston specification; this is not a standard-bore replacement. |
| 2008 | Yamaha | YZ 250 | Vertex application: Yamaha YZ 250, 1999-2025. Part 24079B: +5.6mm Cast Big Bore Piston Kit. 72mm. 295cc. Includes (Piston, Rings, Wrist Pin, & Circlips). Shorter wrist pin to crown height for big bore cylinder. *Must modify cylinder bore, cylinder head surface and cylinder head. Cylinder diameter: 72mm. Size over standard: +5.6mm. Piston OD: 71.95mm. Compression ratio: STD. Displacement with big bore kit: 295cc. Match the exact big bore piston specification; this is not a standard-bore replacement. |
| 2007 | Yamaha | YZ 250 | Vertex application: Yamaha YZ 250, 1999-2025. Part 24079B: +5.6mm Cast Big Bore Piston Kit. 72mm. 295cc. Includes (Piston, Rings, Wrist Pin, & Circlips). Shorter wrist pin to crown height for big bore cylinder. *Must modify cylinder bore, cylinder head surface and cylinder head. Cylinder diameter: 72mm. Size over standard: +5.6mm. Piston OD: 71.95mm. Compression ratio: STD. Displacement with big bore kit: 295cc. Match the exact big bore piston specification; this is not a standard-bore replacement. |
| 2006 | Yamaha | YZ 250 | Vertex application: Yamaha YZ 250, 1999-2025. Part 24079B: +5.6mm Cast Big Bore Piston Kit. 72mm. 295cc. Includes (Piston, Rings, Wrist Pin, & Circlips). Shorter wrist pin to crown height for big bore cylinder. *Must modify cylinder bore, cylinder head surface and cylinder head. Cylinder diameter: 72mm. Size over standard: +5.6mm. Piston OD: 71.95mm. Compression ratio: STD. Displacement with big bore kit: 295cc. Match the exact big bore piston specification; this is not a standard-bore replacement. |
| 2005 | Yamaha | YZ 250 | Vertex application: Yamaha YZ 250, 1999-2025. Part 24079B: +5.6mm Cast Big Bore Piston Kit. 72mm. 295cc. Includes (Piston, Rings, Wrist Pin, & Circlips). Shorter wrist pin to crown height for big bore cylinder. *Must modify cylinder bore, cylinder head surface and cylinder head. Cylinder diameter: 72mm. Size over standard: +5.6mm. Piston OD: 71.95mm. Compression ratio: STD. Displacement with big bore kit: 295cc. Match the exact big bore piston specification; this is not a standard-bore replacement. |
| 2004 | Yamaha | YZ 250 | Vertex application: Yamaha YZ 250, 1999-2025. Part 24079B: +5.6mm Cast Big Bore Piston Kit. 72mm. 295cc. Includes (Piston, Rings, Wrist Pin, & Circlips). Shorter wrist pin to crown height for big bore cylinder. *Must modify cylinder bore, cylinder head surface and cylinder head. Cylinder diameter: 72mm. Size over standard: +5.6mm. Piston OD: 71.95mm. Compression ratio: STD. Displacement with big bore kit: 295cc. Match the exact big bore piston specification; this is not a standard-bore replacement. |
| 2003 | Yamaha | YZ 250 | Vertex application: Yamaha YZ 250, 1999-2025. Part 24079B: +5.6mm Cast Big Bore Piston Kit. 72mm. 295cc. Includes (Piston, Rings, Wrist Pin, & Circlips). Shorter wrist pin to crown height for big bore cylinder. *Must modify cylinder bore, cylinder head surface and cylinder head. Cylinder diameter: 72mm. Size over standard: +5.6mm. Piston OD: 71.95mm. Compression ratio: STD. Displacement with big bore kit: 295cc. Match the exact big bore piston specification; this is not a standard-bore replacement. |
| 2002 | Yamaha | YZ 250 | Vertex application: Yamaha YZ 250, 1999-2025. Part 24079B: +5.6mm Cast Big Bore Piston Kit. 72mm. 295cc. Includes (Piston, Rings, Wrist Pin, & Circlips). Shorter wrist pin to crown height for big bore cylinder. *Must modify cylinder bore, cylinder head surface and cylinder head. Cylinder diameter: 72mm. Size over standard: +5.6mm. Piston OD: 71.95mm. Compression ratio: STD. Displacement with big bore kit: 295cc. Match the exact big bore piston specification; this is not a standard-bore replacement. |
| 2001 | Yamaha | YZ 250 | Vertex application: Yamaha YZ 250, 1999-2025. Part 24079B: +5.6mm Cast Big Bore Piston Kit. 72mm. 295cc. Includes (Piston, Rings, Wrist Pin, & Circlips). Shorter wrist pin to crown height for big bore cylinder. *Must modify cylinder bore, cylinder head surface and cylinder head. Cylinder diameter: 72mm. Size over standard: +5.6mm. Piston OD: 71.95mm. Compression ratio: STD. Displacement with big bore kit: 295cc. Match the exact big bore piston specification; this is not a standard-bore replacement. |
| 2000 | Yamaha | YZ 250 | Vertex application: Yamaha YZ 250, 1999-2025. Part 24079B: +5.6mm Cast Big Bore Piston Kit. 72mm. 295cc. Includes (Piston, Rings, Wrist Pin, & Circlips). Shorter wrist pin to crown height for big bore cylinder. *Must modify cylinder bore, cylinder head surface and cylinder head. Cylinder diameter: 72mm. Size over standard: +5.6mm. Piston OD: 71.95mm. Compression ratio: STD. Displacement with big bore kit: 295cc. Match the exact big bore piston specification; this is not a standard-bore replacement. |
| 1999 | Yamaha | YZ 250 | Vertex application: Yamaha YZ 250, 1999-2025. Part 24079B: +5.6mm Cast Big Bore Piston Kit. 72mm. 295cc. Includes (Piston, Rings, Wrist Pin, & Circlips). Shorter wrist pin to crown height for big bore cylinder. *Must modify cylinder bore, cylinder head surface and cylinder head. Cylinder diameter: 72mm. Size over standard: +5.6mm. Piston OD: 71.95mm. Compression ratio: STD. Displacement with big bore kit: 295cc. Match the exact big bore piston specification; this is not a standard-bore replacement. |
Check the exact vehicle application and specifications before ordering. Ask HPE if a detail is missing.