how big can I bore ?

[Josh]

can I bore a standard cylinder to 68mm ? and how much power can I get from it with following mod's:
bored to 68mm
head shaved 0.35
ken O'conner diy port and polish.
30mm carb
K&n filter
paul turners fatboy 2 exhaust
Pyramid reed valve and reeds
vito's reed spacer
timing advanced +4 - +6

I already have the fatboy 2 exhaust and pyramid reeds but everything else is standard will these mods make a big difference ?

 

[CARNZ]

you won't gain much power by boring your cylinder to max bore. only overbore when you NEED to. those few CCs will do almost nothing for power gain. BUT you can install a big-bore cylinder