Hell yes porting is worth it, those t5's will really wake up. I would have someone that has done porting on the banshee cylinders. Alot of guys can do porting, only a few can extract serious power. All depends how you ride. No need for race gas, only when you raise your compression. Single carb should work good with the porting, duals would be better if you like to rev the piss out of it and get every ounce of power.. No problems with porting just do some research on the guy thats going to do the porting. I chose Jeff @ f.a.s.t. for many reasons. Good luck to you.