C90's CC

For your future reference, you can figure out the displacement of any reciprocal internal combustion engine, automoble or motorcycle, by using the folllowing formula (it does not work for rotaries):

1/2 the bore squared (the radius of the cylinder) x the stroke (the height of the cylinder) x pi (3.1416 will do) x the number of cylinders. So, for the C90, with a bore of 96mm and a stroke of 101mm, the displacement would be:

48 x 48 = 2304

2304 x 101= 232,704

232704 x 3.1416 = 731062.8864

convert cubic millimeters to cubic centimeters by dividing by 1,000 = 731.0628864
(This step only necessary where cylinder specs are given in millimeters - if given in centimeters or inches, this step is omitted)

731.0628864 x 2 (number of cylinders) = 1462.1257728 cc

There you have it.
 
In the new bikes, (C90, C50, S40) Suzuki's badging them with cubic inches. There's just a little over 61 cubic inches per liter (1000 cc's). 90 is about half again 61, 90 cubic inches is about 1.5 liters, or 1500 cc's
 
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