Im trying to find a 520 sprocket kit for my cbr, problem is i cant find a 14/45 combo with a 520 chain..... anyone know where i can get it?

 

http://cgi.ebay.com/ebaymotors/520-C...mZ320558728796

There's one on ebay. $110. Not bad, o-ring style chain and what not. Not name brand though, unsure of the quality, but for that price it may be worth risking.

 

I just pick up some 14, 44 & 48 520 sprockets for my track bike at: http://www.jtsprockets.com/52.0.html...el_uid=4522&p=
AFAM makes them as well.

 

I would go with 520 unless you're really trying to get everything you can out of the bike and don't mind throwing away a bunch more money. A 530 chain will last far longer, and the acceleration difference isn't nearly as significant as other equivelantly priced modifications.