two ways to clean ur axle up
sanding and polishing......
faster than waiting ... 180 sand paper... than 320.. than 400... than 0000 steel wool with mothers mag and aluminum polish... than just steel wool.... than rag and polish....
will make that axle look like chrome!!.. might do this on my 200x next time im bored... support it with the rear end in the air.. start it and put it in second gear.. let the motor do the work for me
or an old school trick , it takes a few rides to notice it working but it does work ......
buy a kids size leather belt.
cut them to fit
use some nutnbolt weights to fasten them.
give it about 15 miles or so , b4 it starts to work ...u'll start to see it getting cleaner ..the longer you leave them on the cleaner it gets