CB1140

[rbike_imp]

For those that care and won't get a headache, the Formula is:
4 (cylinders) x PI (3.14159265359) x R x R (squared) x H
= 4 x 3.14159265359 x (73.5/2) x (73.5/2) x 67.2
= 1,140,496.151 cubic mm
= 69.597 cubic inches

So the model number is in CC (cubic centimeters) vs CM (cubic millimeters) instead of the specifications units of measure. They could have posted 7.35 and 6.72 cm respectively.

That results in
= 4 x 3.14159265359 x (7.35/2) x (7.35/2) x 6.72
= 1140.496151
= 1140 (rounded to nearest integer)