I have a 2007 hayabusa , I got on it a little engine just stopped ,now it just turns over but won`t start please help ?

no carbs on hayabusas they are fuel injected. it has four throttle bodys that control the air into the motor by the throttle grip.

Hmmmm. 2004 Harley transformed into 2007 Hayabusa. You have lost money my friend.

bad battery

change the spark plug?

Try to clean the throttle body air intake and rev it up a little there may be a blockage that the ECM may have been compensating for when you disconnected the battery the ECM will assume the throttle body is clean and closing fully but dirty carbon may keep throttle open slightly saucing rough running or stalling. Hope this helps

Did you make sure that it has the proper coolant mix ratio as it sounds like it has a large % of water ! it must have the correct mix ratio to maintain proper temp ! It might look like it has the correct mix because of the colour but if you have not done a coolant change your self then there is no way of telling if it is correct so I would flush the system and replace it with a recommended brand and mix ( some are already pre-mixed )

Check the thermostat it might be blown!!!

If you have done 14,500KM since the noise started there can't be a whole lot wrong. They are noisy engines anyway - might be normal. Only thing I can suggest is to check under your clutch cover.