hi guys first thank for all your help and advice through all your posts on this site iv a 900 zxi and (hopefully) iv no probs but managed to learn alot and understand more about the engine ! Anyways iv seen a ultra 150 cheapish 131 hours year 2000 with a vibrating/knocking noise which i think came after fitting new fuel pump it also had a new prop (is this shaft?) and/or impeller fitted ?? Trying to get more info but first thoughts chaps is it just lots of problems or relatively easy fix cheers in advance