Last week I began to experience what feels like a misfire when running at low RPMs (approx. less than 3.5K) and the bike is at operating temperatures. When I got home I pulled the plugs and all but #4 Cyl looked fine; #4 wasn't bad it was just darker with a hint more buildup. I replaced the plug with a brand new NGK CR9E, the same as what came out of that cyl. The next day I took her out and thought every thing was peachy, figured I had a bad plug that finally petered out but when the bike reached operating temperatures the sputter came back. 
I notice it when I leave the line from a stoplight or doing a slow roll through the neighborhood.
As I am writing this I begin to fear a coolant leak into a cylinder. Once the fluid begins to flush through the jackets it leaks into #4 causing the sputter and higher RPMs clears out the coolant faster than it can be replaced. Please tell me I don't have a leak.
My first thought is a coil has gone bad/ is going bad. This problem seemed to crop up after sitting at a light on a hot day and the heat was roiling up, I fear heat may be causing a coil to misbehave.
Anyway, I did a search for low RPM misfires and didn't have much luck so please don't set me on fire. I hope someone can provide some genius insight as I am on a tight budget - recently retired from USAF after 21 years - so I don't have much cash on hand. I am not afraid to dig into the motor and have a maintenance background.
Bike stats: '05 Busa with Power Commander V and Brocks Street Meg Black Full System 20" Muffler both installed May 2011. I have also done the air box mod and pair valve is blocked off. I haven't had issues until last week.
Any help or suggestions is appreciated.
:1zhelp:
I notice it when I leave the line from a stoplight or doing a slow roll through the neighborhood.As I am writing this I begin to fear a coolant leak into a cylinder. Once the fluid begins to flush through the jackets it leaks into #4 causing the sputter and higher RPMs clears out the coolant faster than it can be replaced. Please tell me I don't have a leak.
My first thought is a coil has gone bad/ is going bad. This problem seemed to crop up after sitting at a light on a hot day and the heat was roiling up, I fear heat may be causing a coil to misbehave.
Anyway, I did a search for low RPM misfires and didn't have much luck so please don't set me on fire. I hope someone can provide some genius insight as I am on a tight budget - recently retired from USAF after 21 years - so I don't have much cash on hand. I am not afraid to dig into the motor and have a maintenance background.
Bike stats: '05 Busa with Power Commander V and Brocks Street Meg Black Full System 20" Muffler both installed May 2011. I have also done the air box mod and pair valve is blocked off. I haven't had issues until last week.
Any help or suggestions is appreciated.
:1zhelp:
