Got all these important items: Owners Manual, Engine Repair Manual and Engine Parts Manual. They come as three separate manuals.
Spoke with Lee of ATK USA in Salt Lake City, Utah today! He said, change the timing belt once a year and to keep an eye on the sprocket shaft, best time to check it is when doing oil changes. Other than that - ENJOY! Bit more detailed than that, but never the less, I was able to spend time talking with him as he personally has built a lot of these bikes and has some serious racing history with his 605.