Wyoben

I have a 72 King Scorpion ,I'm 61 years young ,actually have 2 of them , riding one and restoring the other contemplating putting it in my living room so I can drool over it ... I had this same bike when I was a teeny Bopper in the 70's...anyway , I need to completly drain and refil engine/trans fluids , any tips on how and where to get all the old lubricants evacuated , and where to fill same , thanks from dirt Bike heaven WYOMING Ben