Pistons
For ATHENA cylinder kits and standard cylinders
Compression ratio: 13.9:1
A-dimension, D=77.95 mm
For the ATHENA cylinder kit
Compression ratio: 12.9:1
A-dimension, D=77.96 mm
Compression ratio: 13.9:1
A-dimension, D=77.95 mm
Dimension A = 76.96 mm
For the ATHENA cylinder kit
Compression ratio: 12.9:1
B-dimension, D=77.97 mm
Compression ratio: 13.5:1
A-dimension D = 77.96 mm
Compression ratio: 13.9:1
B dimension,
D = 77.96 mm
Compression ratio: 14.4:1
A-dimension, D=77.96 mm
For the ATHENA cylinder kit and standard cylinder kit
Fits:
- CRF 250 (2004-2005) Standard Cylinder Kit
- CRF 250X (2004-2005) Standard Cylinder Kit
- CRF 250X (2004-2005) ATHENA cylinder kit
Compression ratio: 12.9:1
C-dimension, D=77.98 mm
Compression ratio: 13.5:1
B dimension D=77.97 mm
Compression ratio: 14.4:1
B dimension, D=77.97 mm
Compression ratio: 13.5:1
C-dimension, D=77.98 mm
Compression ratio: 14.4:1
C-dimension, D=77.98 mm
Dimension C = 76.98 mm
For the ATHENA cylinder kit and standard cylinders
Compression ratio: std
A-dimension, D=78.95 mm
A dimension, D = 76.95 mm
A dimension, D = 78.95 mm
For the ATHENA cylinder kit and standard cylinders
Compression ratio: std
B dimension, D=78.96 mm
B dimension, D = 78.96 mm
Dimension C, D = 78.97 mm
Dimension B, D = 76.96 mm
For the ATHENA cylinder kit and standard cylinders
A-dimension = 87.96 mm
For ATHENA cylinder kit and standard cylinders
B dimension = 87.97 mm
For the ATHENA cylinder kit and standard cylinders
Compression ratio: 13.5:1
A-dimension = 87.95 mm
Compression ratio: 14.2:1
A-dimension, D=87.95 mm
For the ATHENA cylinder kit and standard cylinders
Compression ratio: 13.5:1
B-dimension = 87.96 mm
Compression ratio: 14.2:1
B dimension, D=87.96 mm
Compression ratio: 14.2:1
C-dimension, D=87.97 mm
Compression ratio: STD
C dimension = 88.98 mm
Compression ratio: STD
A-dimension = 88.94 mm
Compression ratio: STD
B dimension = 88.95 mm
Compression ratio: STD
A dimension = 88.96 mm
Compression ratio: STD
C dimension = 88.96 mm
Compression ratio: STD
B dimension = 88.97 mm
For the Athena Cylinder Kit and standard cylinders
A-dimension = 89.94 mm
Compression ratio: STD
B dimension = 94.97 mm
High-Compression Piston
For Athena Cylinder Kit and Standard Cylinders
Compression ratio: 13.5:1
A-measurement = 94.94 mm
Compression ratio: 11:1
A-dimension = 94.94 mm
For the Athena Cylinder Kit and standard cylinders
A-dimension = 94.94 mm
For the Athena Cylinder Kit and standard cylinders
Compression ratio: 12.5:1
A-measurement = 94.94 mm
High-Compression Piston
For Athena Cylinder Kit and Standard Cylinders
Compression ratio: 13.5:1
B-dimension = 94.95 mm
Compression ratio: 11:1
B dimension = 94.95 mm
A dimension, D = 94.95 mm
For the Athena Cylinder Kit and standard cylinders
Compression ratio: 12.5:1
B-dimension = 94.95 mm
A dimension, D = 94.95 mm
Dimension B, D = 94.96 mm
Dimension B, D = 94.96 mm
c-dimension, D=94.97 mm
Dimension C, D = 94.97 mm
For the Athena Cylinder Kit and standard cylinders
Compression ratio: 12.2:1
C-dimension = 95.48 mm
Pistons: engineered for motocross and enduro riders. Strong materials, precise fitment and reliable performance.





