I have modified one of the newer 25cc Poulan engines, a California, 2005 engine. The engine has an opened up Zama carb and some internal changes. The ignition is a TIM with 60 degrees of dwell and a 1/4-32 spark plug. This engine has turned an APC 16/8 at 8400 rpm on gas only. The weight is 40 oz including battery and muffler. I was wondering how those numbers compare to what other builders of the Poulan 25cc have gotten.