Hi, I'm refurbing my little scooter at the moment.
The motor brushes don't look too good, although they're not that old. I wonder if the uneven wear is caused by overspeed going down steep hill?
When brushes are new I think regen braking can hold scooter at 4mph down steep hill, but as they wear overspeed creeps up, which causes more wear, which causes more overspeed, etc, etc, until I crash and killed
So questions are...
As there looks to a lot of meat left on brushes can I square the end off on a bench grinder?
Two, if I buy replacement brushes why are mine a golden colour? I thought brushes were all graphite grey. In fact I've seen some similar power tool brushes in grey which are cheaper than my gold colour brushes. But I'm wondering if mob brushes have to be more robust?
When/if i fit new brushes I plan to go slower downhill so overspeed and excessive brush wear doesn't happen. It only occurs if I barrel down on full throttle.