I took the pulley apart and it was pretty sludgy as shown in the pic. Hosed it down with degreaser and got it spic and span. The shifting is basically non-existent. Front variator might close a few millimeters but that's about it. Didn't have time to reassemble, but I think i'll lube it up and give it a shot next weekend. As for petcock question, I'm using a new tank and petcock/screens for a 50cc dirt bike that I found online. Original tank needs to be de-rusted and coated, but haven't had time.