30-01-14, 06:51 PM
It sounds to me you've been unfortunately sold a dog not that you want to hear that or that it's needs pointing out to you but I think that's the whole point. It's very, very likely based on what you've said most of the rad matrix is blocked by the said gunk, it's also possible the said gunk is a form of rad weld put in to seal whatever the real reason is/was for the owner selling the bike! I've seen things of a very similar nature before, it's also possible the head or liner/s are holed somewhere rad weld can when mixed with escaping combustion gases turn to goo as you put it! It's very likely I'm wrong as trying to diagnose complicated issues via owners descriptions is very difficult if not impossible without seeing things for your sake I hope I'm wrong! I'd seriously look at Deefer666 idea though :thumbup
Later