A healthy stock cp3 can do around 600 give or take. A sportsman usually low 6s maybe 650. MOST cp4s tap out around 500 to 540s. Sportsman will fuel all the way to 4500 rpms where the stock cp3s fall off at 3000. Ive yet to hear about or see proof of a redesigned cp3 that wont fail. 11 through 16s all have failed. So if they did redesign it they didnt do too well.