Your browser does not seem to support JavaScript. As a result, your viewing experience will be diminished, and you have been placed in read-only mode.
Please download a browser that supports JavaScript, or enable it if it's disabled (i.e. NoScript).
@panmil92 I don't recall there being any certain type of weak point. Fairly bullet proof motors.
It's just general items. Bearings, bushes and seals.
@finnerz89 Used to notice it a lot on my little 50cc Aprilia RS when I was kid coming home from a late night!