Does anybody know if a fcr 35mm dual carb is big enough for 727cc engine?
Is a mikuni 34/38 or 36/40 better for this engine?
Thanks

 

better than stock, but the motor has more potential with a bigger carb

 

Stock is dual 33mm. Dual 35's or so for a good midrange and lots of power throughout. Bigger if you've got the cam, porting, and top end bias desire. If you want to run a single mikuni look for something around 48mm or so.