I have a 2008 hayabusa. I have a full Yosh r-77 4-2-1 exhaust with a pc3. When i first start the bike when its cold it bogs down almost stalling, runs rough for a min or so and eventually smooths itself out. if you give it gas it bogs even more. I recently just purchased this 4 days ago. The bike runs great, has a ton of power and has no hesitation after the start up issue. I changed the plugs today, put some seafoam in to clean it out. I wonder if it has a wrong map or somethingnin the pc3- not sure though... I changed the plugs today thinking that may be the issue. No luck. has anyone ever ran across this?