I did the 520 conversion as well and went up 2 teeth on the rear sprocket. 520 front sprocket, black and gold 3D 520 chain. Everything besides the chain I went with CNC racing all black except the bolts. Love the set up and love the 2 extra teeth on the rear sprocket. One member here went up 3 teeth on the rear sprocket. Says he loves it but the wheelie launch control is as though its not even on the bike. My front just hovers above the ground is I throttle it. So I can just imagine what going up 3 teeth would be like lol