Pistons
A=53.94
1-PISTON RING
A=53.94
12° piston
B=53.95
1-PISTON RING
B=53.95
12° piston
C=53.97 1-PISTON RING
C=53.96
12° piston
D=53.97 1-PISTON RING
D=53.97
12° piston
A=66.34
2-PISTON RINGS
B=66.35
2-PISTON RINGS
C=66.36
2-PISTON RINGS
D=66.37
2-PISTON RINGS
D=46.97
Attention:
This piston requires a clearance of 0.04 mm! This requires cylinder modification and a suitable head insert. Only for use in air-cooled engines!
A dimension: 62.45 mm
B dimension: 62.46 mm
C dimension: 62.47 mm
For Athena Big Bore Kit (290 cc),
A-dimension D=82.95 mm
For the Athena Big Bore Kit (290cc),
C-dimension D = 82.97 mm
Dimension A: 53.94 mm
Dimension B = 53.95 mm
Dimension C: 53.96 mm
For the Athena Big Bore Kit (500 cc),
Dimension = 101.96 mm
For the Athena Big Bore Cylinder Kit
A-dimension = 52.95 mm
For the Athena Big Bore Cylinder Kit
B-dimension = 52.96 mm
For the Athena Big Bore Cylinder Kit
C-dimension = 52.97 mm
For the Athena Big Bore Kit (280cc), A-measurement D=81.95 mm
For Athena Big Bore Kit (290 cc),
A-dimension D=82.95 mm
For the Athena Big Bore Kit (290cc),
A-measurement D = 82.95 mm
For Athena Big Bore Kit (290 cc),
B-dimension D=82.96
For the Athena Big Bore Kit,
A-dimension D=82.95 mm
For the Athena Big Bore Cylinder Kit
A-dimension = 49.93 mm
For the Athena Big Bore Cylinder Kit
B-dimension = 49.94 mm
For the Athena Big Bore Cylinder Kit
A-dimension = 49.95 mm
For the Athena Big Bore Cylinder Kit
B-dimension = 49.96 mm
For the Athena Big Bore Kit,
A-measurement = 57.94 mm
For Athena Big Bore Kit (144 cc),
A-dimension D=57.94 mm
For Athena Big Bore Kit (144 cc),
B-dimension D=57.95 mm
For the Athena Big Bore Kit,
B-dimension D=57.95 mm
Pistons: engineered for motocross and enduro riders. Strong materials, precise fitment and reliable performance.





