My Yamaha junoon also has the same problem, these companies - suzuki and yamaha both have it...
The problem is definitely in the plug's adapter.. remove the adapter and directly put the wire on the spark plug and then kick start ur bike...
If it starts then the problem is in the adapter, the reason for which I dont really know.
One guys said these bikes have poor current coils thats why they leave current upon slightest amount of dampness in the adapter, the other guy said these bikes have an earth system.. the current goes in the earth wire if there is any water/dampness in the plug/adapter.
So i dont know its their "Advance" electric system with safety system? Or Pathetic current coil problem?
My 98 Model CD70 eva eva eva never had this kinda problem no matter what u do!
what u need 2 do is, buy an extra adapter in ur pocket... If ur bike wont start up after a wash, put the dry one and go home.