I know everything about these. My dad had five of the C-Dale dirtbikes. They cheapened up the motors in 03, 02's were the best. Best suspension you can get, look at the welds on the frame and you will know the quality right there. They were so far ahead of their time, Yamaha's 450's weren't fuel injected and aluminum framed til 09. The only problem with the bikes is that the batteries weren't big enough and the stators weren't powerful enough. The quad were fine though. All the parts are being sold through ATK because they bought out Cannondale. These bikes were made right here in the good old USA (Bedford, PA to be specific). The Moto440 was an amazing quad for the MX track but it did cost $12K, the Cannibal was the best seller though and was still excellent. If you have any more questions let me know!
Give us more details about the model, year and if you could post pics that would be good too.