So I've got a 2005 Bianchi Brava - the last model year to feature a threaded headset w/ quill stem and all. I'm kicking myself right now for not going for the 2006 w/ threadless. Here's the deal.
The stock, 3-month old headset comes loose within a few days of getting tightened up properly. I took it into the bike shop twice - each time they took their wrenches and tightened it, only to have it get loose again on the trail, etc. The third time, they disassembled it, cleaned it, reassembled/tightened it, and said I was good to go. Instead, it came loose again within twenty miles.
I'm now two days out of my LBS's 90-day free service period, but this has been happening since day one and it still hasn't been resolved. The last time I was there, the mechanic gave me the impression that I would have to pay for a replacement headset if it came to that, but he also mentioned that I had supposedly stripped the headset by riding on it while it was loose. Which wouldn't be my fault, given that it had been coming loose since day one. However, it complicates things that I tightened it up once with an ordinary crescent (stripping the finish but getting the job done).
So I'm heading down to the LBS sooner or later but I'm not sure what I should push for. What if they tell me I'll have to pay for a new headset? What if it turns out the fork is at fault? The 05 is still pretty much new, albeit with signs of hard riding. So I'm not sure how much I'm in a position to demand. Some told me to insist on a new headset, or a threadless fork, or even a NEW BIKE. I don't know what to do.