Ok thanks. The reason I was thinking the pistons is because Vito's site says the power pistons are design to change the exhaust timing and help low end. But all i can find on there are big bore. I was going to get reeds too the ones i have are shot. just cant decide what way to go. Thinking stock cage and port it and use boysens or maybe the chariot one but money is tight. What does it cost to mod the stock plate? The Vito's adjustable plate is like 30.