From my experience ,these lightweights had very poor wheel bearings ,generally loose balls ,cup and cone .....the outer race was always the expanded and flanged out hub ,and the bearings quickly developed big lumps and bumps ,as the case hardening went thru...........the thin frame tubes broke and forks had no replaceable bushings,just steel on steel....... a lot more of the Villiers motors survived than the bikes.......Australia was a tough place for bikes ,dirt roads ,dust,sand ,long distances ,and zero maintenance .