Working on the tank while I'm waiting on my kick-ass CL100 scrambler pipe to get here. Cost $150 shipped, but a decent CB100 pipe was gonna cost me $130 shipped so I spent the extra $20 and got the cool one. Can't wait!
So the tank was a total rust bucket inside. I forgot to take a "before" pic, but it was pretty bad. PO claimed to have cleaned it once but I'm not sure I buy that. You could hear chunks of stuff rattling around inside if you shook it. So this past weekend I spent about an hour with a hose and some nuts/bolts and got all of that chunky stuff out of there. At first I was concerned that it was a lot of material coming out, but it seems to hold water OK so I'm not planning on lining it if I don't have to.
First, plugged the petcock hole with a little cork I got at the hardware store and put in about half a bottle of The Works toilet cleaner. Filled to the top with water and let it sit overnight. This is what it looked like the next morning:
I drained that out.. look at all that crap!!
Rinsed a few times until the water was running pretty clear. Then I put the cork back in and put in a whole bottle of The Works, along with about a quart of water and a few nuts/bolts. Shook it about ten times - each time for a minute, and with about a 5-minute rest period(!) - and here is the result:
Finally, filled it to the top with water and let it sit overnight. Will see how it looks when I get home. My plan is to drain it and rinse, then hit it with some alcohol to help absorb any extra water, then put a little 2-stroke (premix) gas in there, slosh that around & drain a few times, then put the petcock on and fill with gas. It SHOULD stay clean.. may have a little flash rust but all of this is such a vast improvement over how it was that I think I'd be okay with an inline filter. Stay tuned.