[Puckfu]

I have a 99 CBR. I don't ride it as I kept it for my wife who is now my X Wife so it does not get ridden. I take it around the block every now and then just to keep fluids flowing and keep it on the up and up. Well this weekend I was going to put it out front for sale and it would not start. Spins over fast. I pulled the plugs and its getting spark. Checked the fuel pump and it is pumping. Checked fuel filter and it is clean, Pulled the carbs and they are free with no build up in them. Floats are good. At first it popped but now nothing. Just spins over.

 

[nickalltogether]

The starter turns fast or the motor turns fast? If it's just the starter turning then the starter probably isn't engaging correctly to turn the motor. If the motor turns fast then you don't have proper compression.