hey guys i have a 2000 kx 125 and im bored of it ive been riding since i was 6 and im 18 now i jsut got this biek this year and im already bored! i thought it was so fun at first and the powerband was insane now i dunno what the heck i have the exhaust done, new top end when i bought it i barely road it this ummer and it starts first kick! I was thinking would porting and polishing the heads make a difference? and what difference would it make? is it safe for the bike? and any other usggestions or advice? i dunno what it is i think its making the exhaust valve bigger or somethign not sure any help greatly appreciated thanks !!!!!