I have an 03 Bansh, Full FMF exhaust and a single trinity carburetor, but i want just a lil more, i found a WSM piston kit on dennis kirk, would just the standard size bore kit make a difference or should i go ahead with a .20 over kit?? I dont wanna go to a big bore because of the next rebuild. thanx in advance

 

Get it ported. You can get a mild trail port for around 200 and get way more preformance gain then pistons. A .020 bore really wollnt do much at all hp wise. Even a .080 will only give a few hp. And its a waste of perfectly good bores. good luck

 

i dont wana sound stupid cause i have been around engines all my life just not cycle engines, but what do they do when they port one??

 

They take material out of the ports so it flows better.

 

Anything from clean up the ports form rough spots to enlargeing the holes to adding holes. Porting brings a banshee to life and uncorks it from the factory.