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There are like 100000 threads about chains and sprocket just in the last 4 years I've been on here. use search
here are three I found right off the bat… I’m sure you can find more if you looked for more than the 3 seconds i did
http://www.nestreetriders.com/forum/...o-you-use.html
http://www.nestreetriders.com/forum/...-question.html
http://www.nestreetriders.com/forum/...et-advice.html
street or track?
street - stick with the steel 525 SunStar sprockets with a 525 DID VM2 chain
track - vortex aluminum 520 sprockets with 520 DID ERV chain
I do not advise aluminum for a street bike but that's just me.