I have an 89 ninja 600r. When the bike gets is relatively warm the bike will start to sputter and then it will stall out. After that it will not start for about 30-45 minutes.

I have recently cleaned out the carbs... thought that might take care of it.

If anyone can help please let me know....
Thanks

 

Welcome to KF!
Like everyone would say, how do the plugs look? Then ohm out the plug wires. 35-40 minutes of cooling makes me think electrical issues.

 

Plugs are brand new

 

Check your grounding. Heat does strange things with ground connections.
I'm assuming the gas is on and fuel is not an issue?

 

yup, ground or other. Ohms law

 

+1