Back in November, I acquired a used 2006 TW200 from a Craigslist ad. It quit running a few days after I got it home. After troubleshooting it with the help of the knowledge available on this forum, I decided that I was stumped and needed professional help with it. I contacted a local independent shop to have a look at it. A long story and almost $500.00 dollars later it was repaired. The cam sprocket, collar, timing chain, and cam had to be replaced. The original cam sprocket had cracks through it in several places. They also changed the oil in it and adjusted the valves. Earlier today while riding it I hear an intermittent screeching sound like a car belt might make. The bike then proceeds to shut down when I pull in the clutch. It refuses to crank anymore. I checked on the site here and have seen similar versions of this happen to other people. I pulled the oil filter that the shop installed and it does not have the openings! I am not having good luck getting into this hobby of riding motorcycles. I have doubts about the shop owning up to this. I do not know the extent of the damage or how much it will cost me to fix this at this point. I kind of wonder if the little bike is worth it. Have any of you been in a similar predicament? If so, how did you handle it? Either way, thanks for any input.