How Many CC’s

[Lamaddict]

Suzuki 185 (64mm) piston and a 115x60 crank. What would the CC’s be?

[Darrell Taylor]

a basic acu method of calculating cubic capacity is bore x bore x stroke x 0.785

so 64 x 64 x 60 x 0.785 = 192.92 cc

[garry inglis]

We're does the 0.785 come from why not 1mm

[Scooterdude]

Use one of the on line calculators : 193cc

[Shaunbond]

We're does the 0.785 come from why not 1mm

The first 3 figures only calculate the square capacity. The 78.5% is the percentage which converts it to a cylinder.

[garry inglis]

thanks shaunbond

[Chris in Margate]

0.785 has been used because it's Pi ÷ 4

Calculation for volume is PI x R x R x H

PI is 22/7. Divide by 4 instead of dividing the diameter of the piston by 2 twice.

[Scooterdude]

Bit beyond me all this pi stuff, but I like Darrell’s explanation which I have memorised for future reference.

[eden]

a basic acu method of calculating cubic capacity is bore x bore x stroke x 0.785

so 64 x 64 x 60 x 0.785 = 192.92 cc

that's wrong!


use this
https://lambretta-images.com/tuningh/po ... alculator/
or this
https://www.scooterhelp.com/tuning/defs.ccs.html
or this
https://www.icalculator.info/mathematic ... lator.html
or this
http://www.revetec.com/Calculators/Engi ... ator-2.htm

They all give the same result, 193.01943395806632 which most like mine round up to 193.02.

[Shaunbond]

That's because 0.785 has been rounded down its actually 0.78539816339