I just bought a new gas tank and I was wondering if anyone had some instructions on installing it. I'm knew to mechanics, but I'm trying to pick up on it. I'm pretty sure I can figure out the nuts and bolts. It's a Clarke 4.7 Gal for an XR650L. Requires the petcock off the old tank, think I can handle that too. I opened it up and some plastic shavings fell out. What should I use to wash out the inside? Also, there was a piece of metal "inside" the tank, rusty. I've attached a picture. This appears to be some kind of safety bar? Anyway, if you have some suggestions, I'd be glad to hear them.