Why wont my kawasaki start back up after it gets hot?

[b_rosenberry]

Its a 1985 zx 900 ninja that wont start back up until it cools down a bit. I have already replaced the coils-- which did not help. Help please

 

[Gus]

There are a lot of things that might do this, ignition pulse generator can break down when hot, coils, wiring connectors are possible suspects. Check for loose battery cables or corroded connectors. If your spark plugs are black you may have excessive fuel problems, check air filter, choke, carbs,tank vent.

I think you need to check the intake for air leaks. The age of the bike tells me your seals may need replacing.