I have a 680CK also...its a mean machine But like people have said...Hard to find parts for it.... I'm seriously thinking of selling mine for parts as i have cpmpleted what i needed it for ... so if anyone needs parts for theirs just get in touch with me on it... I'd sell it whole for 6500. I had the cyclinders redone on it this past month and the starter completely rebulit... any leaking hoses were replaced... Message me on Facebook if interested in any parts...thanks