250r overbore

[topoortorideon4]

Im getting a 250r motor with a bored 10 over what would that put it at for cc's?

[jadleybray]

66.10x66.10x72x.0007854=247.0736

[cr480r]

66.10x66.10x72x.0007854=247.0736

66.25 * 66.25 * 72 * .007854= 248.196

[3wheelergod]

Wow, you guys do it wierd!
66.25/2 =33.125
33.125*33.125=1097.265625
1097.265625*3.14159=3447.15871484375
3447.1587484375*72=248195.42746875
move your decimal 3 to the left, (cause it is in cubic mm), and you get??????? 248.195427468

Radius of bore squared*pie*stroke. Works everytime!

So that is, 33.125*33.125*3.14159*72

The 10 means .010 or ten thousanths ( also the equavilant to .25mm )
Do NOT expect ANY hp gain by this minimal overbore.

Way to go CR480r you got it right!

[jadleybray]

My bad on the 10th's =.25mm.
bore x bore x stroke x .0007854 is a little less complicated

[NOS_350X]

This is funny, i write it down on a paper, and bam theres the answer, put it into a post and its umm kinda dificult to do, id like to say i do it diffrently but im not shure. LOL

I want to see some more math,

Cr500 on last bore?? whats it come out to. ha ha and you gota find the sizes for everything

[jadleybray]

Radius of bore squared*pie*stroke. Works everytime

Wonder if my motor will be faster if I use this formula? LOL jk