next up was to clean up the sprocket carrier, and mount a new sprocket. i'm using an SV650 rear wheel, and the SV uses a 525 chain while the Versys/ER6 uses a 520. 520 sprockets are readily available for the SV carrier, and i stayed with the stock gearing...46 tooth. Driven racing steel sprocket. OEM 45 tooth 525 sprocket on left, new 520 sprocket mounted on carrier right.