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KMC chains?
the bike is a 1995 Yamaha FZR600, and riding is predominantly street, with only 1-2 track days per year
the sprockets that come with it are no-name steel ones, in the stock 15/45 gearing
I can get all of it, brand new, for $50
I figure for an old, relatively underpowered bike that doesn't get ridden much, $50 is a steal