washed my evo 250 trials bike now it wont start, starts but wont stay running. all electrical dielectric grease and is siliconed. drained the fuel and carb(fresh gas) changed the plug, still the same starts then dies within a few seconds. air filter is dry. at a loss any ideas ?

Have you cleaned the carb & blown through the jets?

You might want to take off the flywheel cover and let it all dry out. Try contact cleaner. Then give it time to dry out. Bring it in the house for a day or two.