Speed geek is giving you some good info. I like the EK ZZZ Chain. If you ran the stock one 20K, the ZVX2 would also be a good choice. GPW/HPC has some sidewinders he thinks highly of, but I don't have any personal experience with them. Stick with a good quality X-ring chain with at least 10K in tensile strength. . There are several good sprockets in steel. PBI, sprocket specialist, JT, Vortex are just the ones I can think of real quick.
The board sponsors will steer you the right way.