05 800 rev not cooling

[sledhead2788]

Replaced thermostat an water pump sled it still
Over heating thinking there might be a clog in the lines don't know how
But if any one has any idea of what it might be

 

[Anylizer]

There are a couple of possibilities... If an old thermostat had come apart, dropping the lower piece into the cooling system, it could cause a restriction. Sometimes that little piece makes it all the way to the water pump, gets caught between the impeller and the housing, and grinds away at the housing enough to cause excess clearance and not allowing the pump to work properly.
Another possibility could be a bad cylinder head o-ring, causing air to be forced into the cooling system and pushing the coolant out and stopping circulation as a result of air bubble at the pump.