undefined Hey, I just ordered a 520 chain and sprocket conversion kit from sumofallparts.net in Texas. The chain is an RK XSO with 8800 tensile strength, and the sprockets are Vortex. You can get any size sprockets along with any color chain ($22 extra.) I got mine with a blue chain. I paid $139 for the set with shipping. The chain color was $22 extra, and if you want, you can even have the sprocket powder coated for $40. No shipping, no BS, awesome! I have looked everywhere and this is definitely the cheapest deal.