I have a 93 gs500. The owner before me did not have gas in the tank for a long time, which made the tank rust really bad. This has created pinholes in my gas tank and I have a very small amount of gas leak out of them. I finally bought another tank off ebay. It's also rusty inside, but does not have holes like my current one. I've read some bad reviews about the kreem and por-15 tank liner kits. Hopefully someone that has dealt with this can help me. Thanks!!
Welcome to the forum.
This thread is more appropriate for the General Discussion area.
Steer clear of the Kreem kits - I've never heard a good thing about them. The Por15 kit is generally considered a better kit, but I've never used either personally.
What if I just cleaned it out and used it? Is the tank liner a must do?
No tanks that I'm aware of came from the factory with a liner, so no they aren't a must do. Clean it out with whatever method suits you, and immediately fill it with gas. Don't be surprised if you get some residual rust spots though.