I was able to sand the back of my rotor and it seems to be working. I could definitely feel those grooves with my finger. How long it will last I can't predict.
When you say there's more wear on the top and bottom, I'm not sure I know what you mean. On my bike the bottom where the roller sits isn't the rotor. The roller sits on the starter clutch gear.
Permanent and perpetual noob.
1979 KZ750 Twin
2009 Kawasaki Versys
