boring a honda 420
 

i have a honda 420 rancher 4x4 2007 that i bog with. i blew the rings out of it and about to purchase new ones. the four wheeler is already disassembled and waiting for parts. i was told that while i had the sleeve and top end of already i could purchase a big bore kit and upgrade it.
the question i have is being a fuel injection ,if i bore it out, would i have to purchase a programmer and mess with the computer side of anything?????

any help would be appreciated.:)