I figure its about time for sprockets and chain. Im on an 05 wr450f and it has 2000 miles of hard off road riding in the woods in the east coast. The bike came with o-ring chain that has held up the whole time, sweet! The question is which chain and sprockets? I,m looking at Vortex but will aluminum hold up or should i go steel and maybe DID or Regina chain What do you think?