I have a 99 zx9r and im having some severe issues with he bike. I bought off a friend who didnt feel like fixing it anymore and was short on cash. Anyways the issues are its running very poorly at idle. when you put it in 1st gear and go to take off it sputters and sounds like its running less cyclinders, but once u get up to 4000-5000 rpms or 2nd through 6th gear it runs great. but it also shots blue flames out the exhaust when decelerating. I am at a loss and need help, its been in the shop twice now and they keep saying its fine but it most odveously is not.