G gwatt5 New Member Apr 13, 2012 140 2 0 Connecticut Apr 27, 2012 #1 i need to bore my piston two sizes what would that size be?
yamaha28 Member Apr 8, 2011 2,266 32 84 Apr 27, 2012 #4 the stock bore size is 66mm. So two bores above that is 66.5mm
Racer51 New Member May 19, 2011 1,775 14 0 33 Northwest Ohio Apr 27, 2012 #5 a stock, stock one or a bbk I cant remember if that was you or not?????I believe it's a 66.50mm boing up in increments of .25mm each piston size.
a stock, stock one or a bbk I cant remember if that was you or not?????I believe it's a 66.50mm boing up in increments of .25mm each piston size.
