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sp1tekiller
12-12-2005, 12:35 PM
What is the displacement of an '84R bored .100 over?
TtownJoeShow
12-12-2005, 12:41 PM
boreXbore+stroke+pi(3,14)+#of cylenders divide by 4 = Displacement
ATCWRENCH
12-12-2005, 12:55 PM
255cc's would be your displacement with a 1mm overbore
Yamahauler
12-12-2005, 02:41 PM
255cc's would be your displacement with a 1mm overbore
It's not a 1mm over bore
.1 inch = 2.54mm

I figured it out to be 270cm^2
not sure if its right...
And I dont think you could bore it that big, is it possible?
sp1tekiller
12-12-2005, 03:27 PM
Yes it is possible, and it has already been done. Was just wondering how big it is.
Mr. Sandman
12-12-2005, 03:39 PM
Try this engine displacement calculator, it's much easier.http://www.straightliners.co.uk/calcs/eng-disp-calc.htm
slothminx
12-12-2005, 03:41 PM
255.1 cc ATCwrench is on the money ;)
TtownJoeShow
12-12-2005, 04:44 PM
277cc.....71mm X71mm = 5041 + 64.4mm stroke + pi 3.14 + 1 Cyl = 5109.54 divide by 4 = 1277.385 that is in mm there fore she is 277cc, max bore is 72mm (so i've heared) 313cc and the combustion chamber is aproximatly 6cc, honda includes that into the total displacement for some reason.
i got this formula from a text book so i know its proper guys
slothminx
12-12-2005, 05:01 PM
ohhhh nuts.......................... ive just been told .100 is an inch measurement so im way out thats 2.54mm so according to the calculator its actually 266.262386259811cc
TtownJoeShow
12-12-2005, 05:52 PM
lol that link gave me the same answer for a 70mm bore and a 70.75 mm bore...i'm sorry but i do not trust that puppy