I'VE HAVE ALWAYS LOOKED AT ADDS ON THE INTERNET AND 75% OF PEOPLE SAID THAT THEY HAVE THERE BIKES PORTED AND POLISHED. WHAT THE HECK IS THAT? DOES IT HAVE TO DO WITH THE PISTONS OR SOMTHIN?

When you see that, they mean that their intake and exhaust ports in the engine have been shaped and polished for optimum efficiency at the rpm ranges they want. Polishing allows air to move around in the engine easier since an engine is just a complicated air pump.