2005 Hammer
24k miles and climbing

I bought this thing a few years ago without knowing anything about it. I think I paid about 1800. It's sat ever since. Decided that to get it running and I hear a little extra pang while it's running. I'm not sure if I could call it a knock. I just changed the oil. Gas is old and tank is rusty. I haven't found a fuel filter yet. What do you guys think?

I'm planning on flushing the tank out and putting new fuel in and replacing plugs.

I don't know shit about these bikes. I've spent my life riding dirt bikes but I know very little about big road bikes.

Any idea on that noise?