what size would theese bores make the motor in cc's?

[Sporttrax400ex]

http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&category=43977&item=2422425862

http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&category=43977&item=2422425863

help appreciated ?

[Texan32]

.040 over = +/- 305
.060 over = +/- 310

these are just rough questimates:cool:

[bigbadbrad]

on the wiseco site in there catuloges they have what overbore is equal to the cc's of the motor

http://www.wiseco.com/PDFcatalogs/2003_CB_honda.pdf

on page 18 is the 300ex

[H_W]

You have to remember that a 300ex starts out at only 282 cc's, so you have to add to that and not 300.