how much carb adjustments will be needed after porting the cylinder heads sorry i hae terrible keypad

 

on what???

 

a raptor 660r

 

If it needs to be rejetted,it probably won't be much.

 

your best bet is to take it and have it dyno tuned, i have seen someone pick up 8 hp by just having a bike jetted properly and everything tuned perfecty. after i done some stuff to my 760 raptor i drove it to Ft. Worth to have it dyno tuned.. if ur going to spend alot of money on mods then u might as well spend more to get it jetted right

thats just what i would do.