So I'm selling my first bike and the mechanic has had it all week. It needed new tyres for the RWC and turned out the steering head bearing needed replacing too. Also got a new battery (not a RWC thing but the old one was on it's last legs). Here's the issue: bike was fine to ride at first, then the first set of lights I stopped at, the idle was really weak and the bike slowly died. This bike loves the choke so I got going again and made sure she was well and truly warmed up then stopped in a back street and it died again. I also noticed that the idle changes when I turn the handlebars to the left.. The advice I need is: how do I deal with the mechanic? If I had done some work on the bike and this happened it would mean a fun Saturday trying to figure out what was wrong ()! However I'm dropping the bike to the new owner on Sunday and don't have the time to (and don't feel like I should have to) figure out the problem.