I did this at TechShop Menlo Park. http://www.techshop.com
I have a 1978 Sachs moped that I finally got to work. It's 2 stroke motor was frozen so my friend rebuilt it. Now its time to clean out the rusty gas tank and replace the oil so I can get on the road.
Step 1: Removal of gas tank
Unscrewing of the nuts and bolts holding the gas tank to the moped.
Step 2: Pouring gas out
Old rusty gas gets poured out of the gas tank.
Step 3: Cleaning
About 2 cups of thinner swished around the tank got the grime and rust out. Then the tank got installed back onto the moped.
Step 4: Oil replacement
Unscrewing the oil compartment and filling it with oil.
My moped is road worthy now. :) Exciting!