Have just bought myself a stock Zx12r and am thinking of tuning. Maybe slip on muffler or whole exhaust although it seems many places do not stock exhausts for it anymore. Have seen people saying zx14 will fit maybe. I have seen an 4-2-1 yoshi but assume it would be too tricky to get to fit and I guess if you have to cut things then you are playing with its effectiveness. Also see a butterfly delete and am thinking of the bar risers as well possibly with helipads as the keep the original look. Any information or opinions would be appreciated. I’m in Brisbane.