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Remove Rust From a Motorcycle Gas Tank

What you’ll need:

  • Acetone
  • Distilled water (it’s important that you only use distilled water)
  • Two stroke oil
  • A length of chain 4 to 6 feet long
  • Rags
  • Something to plug the fuel outlet (I used a small piece of hose a small rag and a piece of black tape)

IMPORTANT NOTE: ACETONE AND RUBBER DO NOT MIX! If you use rubber to seal the fuel output replace it every time you drain the acetone mix as the acetone will eat away at it.

At this point I’m going to assume that you have the gas tank off the bike and that it’s empty. Here is a step by step.

  1. Plug the fuel output and make sure it is sealed
  2. Fill the tank about ½ full of acetone and let it sit turning occasionally
  3. Wait overnight
  4. Shake the tank and empty the acetone/rust mixture into a bucket
  5. Fill the tank ½ way again with acetone and this time drop the chain in
  6. Shake the tank often and vigorously. The chain will knock remaining rust off
  7. Empty the acetone/rust mixture into the bucket
  8. Fill the tank up with distilled water and empty it out. Do this until only fairly clean water comes out and no rust can be heard rattling around. I put a hairdryer in the fuel hole and dried it out immediately after
  9. Fill the tank about ¼ with two stroke oil and shake it around then empty it
  10. Please dispose of the acetone and other nasty chemicals properly