I have a Duncan 340 PV and like it. Originally it was in my 86 ATC 250R but it has been transplanted to my 88 TRX while I'm working on that engine. It is a high quality cylinder and has been very reliable since I got it in 2003. While it is fast and has a lot of torque, I frankly expected a little more out of it. It is not the nitroglycerin sandwich I thought it would be, but perhaps that's because its current state of tune. I've got a CT drag pipe on it and no ignition upgrade. I think I can make it better. If you are spending 1600 or so you should take a serious look at the Sphynx line (check out LED Performance). I think that is a more modern cylinder layout and has more potential than the PC cylinder. My next cylinder is going to be a Sphynx. Here are some pictures of my PC in my TRX:
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