How do you figure a motors cc's
#1
I have been trying to bring a 85'atc250r back to life. It sat in a garage for ten years and the cylinder had to be bored to a 67.50mm piston to get the rust out. So would that change the cc's, if so how do you figure it? The stock size was 66x72, I think are these numbers used to figure cc's?
#5
#6
you DIVIDE by 1000 because you want to know the cubic centimeters, since most dimensions are givin in millimeters you end up with an answer in cubic milimeters...
EG. using diogenes formula & 66mm bore, 72mm stroke...
66 x 66 x 72 x 0.7854 = 246326.57 MM^3
Now divided by 1000 = 246.32657 CM^3
See the difference?? Hehe, You should not wreck your motor in anyways (although I do not know what the maximum allowable bore is on your bike) The "how fast do you want to spend" is just my sig.. I should change it your are like the 5th person to ask me
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EG. using diogenes formula & 66mm bore, 72mm stroke...
66 x 66 x 72 x 0.7854 = 246326.57 MM^3
Now divided by 1000 = 246.32657 CM^3
See the difference?? Hehe, You should not wreck your motor in anyways (although I do not know what the maximum allowable bore is on your bike) The "how fast do you want to spend" is just my sig.. I should change it your are like the 5th person to ask me
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TLC
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07-11-2015 02:28 AM
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