Pistons
Compression ratio: std
B dimension, D=76.76 mm
For the ATHENA cylinder kit and standard cylinders
Compression ratio: std
B-dimension, D=76.77 mm
Compression ratio: 13.5:1
A-dimension = 76.95 mm
Dimension A = 76.95 mm
For the Athena Cylinder Kit and standard cylinders
Compression ratio: 13.4:1
A-measurement = 76.95 mm
Compression ratio: 13.4:1
A-dimension = 76.95 mm
Compression ratio: 13.4:1
A-dimension = 76.95 mm
For the Athena Cylinder Kit and standard cylinders
Compression ratio: 12.6:1
A-dimension = 76.96 mm
Compression ratio: 13.5:1
A-measurement = 76.96 mm
(3 rings)
Compression ratio: 13.5:1
B dimension = 76.96 mm
Dimension B = 76.96 mm
For the Athena Cylinder Kit and standard cylinders
Compression ratio: 13.5:1
A-measurement = 76.96 mm
Dimension A = 76.96 mm
Dimension A = 76.96 mm
Compression ratio: 13.5:1
A-dimension = 76.96 mm
For the Athena Cylinder Kit and standard cylinders
Compression ratio: 13.5:1
A-dimension = 76.96 mm
Compression ratio: 13.5:1
A-dimension = 76.96 mm
Compression ratio: 13.5:1
A-dimension = 77.96 mm
Compression ratio: 13.4:1
B dimension = 76.96 mm
Compression ratio: 13.5:1
A-dimension = 76.96 mm
Compression ratio: 13.4:1
B dimension = 76.96 mm
Dimension A = 76.96 mm
Dimension A = 76.96 mm
Dimension B = 76.97 mm
For the Athena Cylinder Kit and standard cylinders
Compression ratio: 13.5:1
B-dimension = 76.97 mm
For the Athena Cylinder Kit and standard cylinders
Compression ratio: 12.5:1
B-dimension = 76.97 mm
(2 rings)
Compression ratio: 13.5:1
B dimension = 76.97 mm
For the Athena Cylinder Kit and standard cylinders
Compression ratio: 13.5:1
B-dimension = 76.97 mm
Compression ratio: 13.5:1
B dimension = 76.97 mm
Compression ratio: 13.5:1
B dimension = 77.97 mm
Compression ratio: 13.5:1
B-dimension = 76.97 mm
Dimension B = 76.97 mm
Dimension B = 76.97 mm
For the Athena Cylinder Kit and standard cylinders
Compression ratio: 12.6:1
C-dimension = 76.98 mm
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
For the ATHENA cylinder kit
Compression ratio: 12.9:1
B-dimension, D=77.97 mm
Compression ratio: 13.9:1
B dimension,
D = 77.96 mm
Compression ratio: 14.4:1
A-dimension, D=77.96 mm
Dimension A = 76.96 mm
Compression ratio: 13.5:1
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
Pistons: engineered for motocross and enduro riders. Strong materials, precise fitment and reliable performance.





