I talked to quite a few of my bike mechanic buddies and they all said the same thing....you will not feel any significant difference going from a 525 to a 520 due to the fact that they are already so close to the same size. The 520 conversion is more for going from a 530 down to a 520...... there is actually a noticable difference between those two...

Take the money for the chain and just put it towards sprockets!!! That's where it's at..

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2007 CBR 600RR Two bros. C/F slip on--Dynojet usb P/C--Custom mapped--Vortex sprocket -1 front+2 rear--DID X-ring chain--hh pads --Pilot power rubber--competition werkes F/E. Oem blue solo seat cowl and no rear bitch pegs!