May have made had a giant error in judgement or a sound decision for years of fun...

I recently picked up a 2013 ZX10R with tons of spares and all the stock parts. One think i noticed was a stack of worn out rear sprockets. This bike has less than 3000 miles (nearly all track miles) so seems like it is chewing through those sprockets at a break neck (not the best phrase) pace. With over 180HP I don't mind a few extra ounces on the sprocket for some longer sprocket life. Bike has a 520 conversion...

Any suggestions on a brand for steel sprockets. Vortex, Driven, Renthal, etc...

Thanks in advance!

Ron
CMRA# 119