Trump 2020
My Honda TRX250R quad has o-ring seals between the petcock and tank that need to be replaced every few years.
If there's a crack in the tank, you may be able to buy a new one on Amazon.com.
scootertrashbadboy
Wrap the petcock with teflon tape before you put it in. wrap it in the direction of the threads.
Anonymous
Replace it.
Bill
Probably a new fuel tank.