carb and jet question?

[JudyNails]

this is a learn as ya go kinda thing for me...now since the head has been bored out twice now would i need after market jets/carb instead of stock?? would that make a difference in it functioning properly? i'm not entirely sure wut the bore size is..

 

[acezeesawtooth]

typically the bore size wont effect it that much.. you need to rejet after changing things in the engine that effect air flow... air filter, air box lid, carb size, porting exhaust. are the basics. if you could tell us your mods we could get you a starting point for your jets. if its stock id just do a quick plug chop to be sure its still jetted properly