07-29-2012, 06:38 PM
Blocking off the breather ports is a bad idea as they help seat the rings. Race motors in drag cars generally have a setup just like this where the exhaust pulls the fumes out of the bottom end of the motor via vaccum hose and a fitting welded into the exhaust pipe. The factory usually puts those fumes into the intake, but that lessens the potency of the air charge going in. The fumes don't get burned as completely when dumped right into the exhaust, but drag cars aren't built to pass smog testing...neither are our bikes lol 