Hey whats up guys just joined looking for some insight. I'm riding a 2007 cbr1000rr. Bike has full yoshirace exaust, bmc race filters, and power commander. Bikes about 4 months old 5100 miles on it now. It seems the bike is building up wayyyyy to much crankcase pressure when coming off the throttle and is blowing the valve cover gasket right out. The bike runs sweet and still makes great power when on the gas just is not happy when coming off it. I can actually hear it blowing the pressure out and I think the motor is still tight because there are no other symptoms. Runs good doesn't overheat motor sounds fine. I was wondering if anyone else has had this problem or has heard about it. Also if there is any other breathers on the motor other than the tubes coming out of the valve covers. Thanks for any help I might get here.