Thread: Anyone ever repaired a rusty motorcycle tank (Interior) ?

Originally Posted by outlander

I've just done a 6 litre steel Harley tank. Depending on the severity of the rust, you could fill it with white vinegar and leave for a few days, shaking occasionally. I've also used a few handfuls of gravel through the filler cap and given it a robust shaking and a thorough rinsing thereafter. Works for me and costs nothing. Resealing would be optional depending on the finish left in the tank.

My issue is it is the underseat auxiliary tank and has three openings, a 10mm hose fitting, and a 5mm Hose fitting for the intake and a 5m hose fitting for the outflow. So this means whatever I use it will need to be able to be removed, and will need to be liquid as I do not think anything slid will be able to be extracted.