Time to buy a new chain and sprockets and wanting to hear some opinions on what to buy.... I have a stock cylinder stock stroke with drag port, lightened flywheel, +4 timing, shaved head, 30 over wisecos, 34mm alkys, VF2 reeds, and RDZ(shearer) inframes. Wanting to be competitive in 300ft and still be able to do some trail riding. From what I've read in searching this topic I'm thinking of going with 15/42.... what's everyone think?