368 cc
Equation: Cubic Inches = 0.7854 x Num of Cyl x Stroke x bore x bore .
Cubic Inches to cubic centimeters (CC) multiply by 16.39 .
.075 over 0.7854 x 2 x 2.126 x 2.595 x 2.595 = 22.49 x 16.39 = 368 cc .
10 mm stoker
10 x 0.03937 = o.3937 + 2.126 = 2.52 .
0.7854 x 2 x 2.52 x 2.520 x 2.520 = 25.14 x 16.39 = 412 cc ??