Big problem with the old spada. Have always had a problem with the radiator cap (steel cap on aluminium tipped radiator - bad news), it won't really lock in properly, but it's never been a problem until lately. Now the bike runs right at the top of the temperature gauge and you can see a little bit of coolant spitting out of the top of the radiator. The cap won't even lock as well as it used to but it does lock in fairly well, just if you give it a bit of a yank it comes loose. I've checked it after it's got really hot and it's still on there pretty solid. Any ideas? Don't really want to go get a new radiator, i'm gonna sell the bike in the next few weeks.