I bought this last week because I want to try out trials. $400 for a running bike was too hard to pass up. It's obviously not pristine, but then... Neither am I. I hope to get some time on the pegs over next few weeks. There is an event (with a vintage class) with SACTOPITS in October that I'd like to compete in. In order to do that, I need to make some repairs. I need to order a gas cap. I doubt the organizers will allow me out on the loop with a sock stuffed in the gas tank. I also need to fit a spark arrestor. I've never seen a silencer like the one on this bike. Any info on it would be great. Anyway, I pulled the amplifier, er silencer off last night to get a look inside. Packed with carbon and unburned oil. The baffle was completely plugged. All of the little holes were clogged, so I essentially had a straight pipe. After disassembly, I scrubbed on all of the parts for the better part of 3 hours, then let the baffle soak in denatured alcohol (it's all I had) over night. I still have some carbon to scrape off before I put it back together. Can I get a "universal" spark arrestor to fit? Do the supertrap style disks act as an arrestor? What fuel/oil ratio do I want to run in this motor? Whatever was being used is less than efficient. Should I be looking at jetting or something else? All thoughts are welcome. My plan is to just ride it, but I have to get it rideable first. I may at some point attempt a restoration but that time is not right now.