First you can just replace the tank with an o e m.
Rust in fuel tank motorcycle.
Negative impacts of rust in the gas tank.
If your motorcycle s tank is metal most old japanese bikes are then you can seal your rust free tank with red kote fuel tank sealer and liner.
This gas tank is off a 1992 yamaha xt225 serow.
Then there is the third option which is for the roll up your sleeves type.
How to remove surface rust.
With the right supplies and some elbow grease you can remove the rust and reseal your own gas tank.
It gets the fuel inside sloshing around helping to knock naturally forming condensation off the very top of the tank and the use also burns off that stuff letting.
Second you can send your tank off to a shop to be professionally restored.
Add a 50 50 mix of water and clr to your gas tank and swish it around for a few minutes and drain.
Sadly rust can build up without the motorcycle s owner ever noticing even as they tend to other maintenance items.
Frequent use keeps the moisture from the air that modern ethanol laced fuel will pull into the tank from getting a hold.
When it comes to service costs for your motorcycle it s hard to put a price on the cost of getting rid of rust in most cases vehicle owners would probably rather replace a fuel tank than try and scrub the rust out of it.
Or aftermarket motorcycle gas tank.
To seal your tank with red kote.
Tank or entire motorcycle was stored or parked for a period of time with less than the maximum amount of fuel in the tank possibly stored with tank empty.
After about 15 minutes or longer if the rust warrants it drain the tank remove the hardware and flush it with a little fresh gas or brake wash.
Pour a bit a denatured alcohol to the tank swish around and drain.
Rust the most common known chemical reaction that occurs on metal.
A common symptom of a neglected motorcycle appears in the form of a rusted fuel tank corroding from the inside out as trapped condensation begins to oxidize and erode the metal tank.
You can finish the job by coating the tank with a plastic sealant like kreme or if it was just surface rust simply put it back in service.