May I legally ride a 125cc motorcycle on a freeway?

Question:

Can you please advise on what the current law stipulates with regards to the use of a 125cc motorcycle on a freeway?

Answer:

Reg 323 does allow a 125 cc motor cycle on a freeway. 50 cc’s are not allowed. However an authority may display a road sign prohibiting bigger motor cycles as on the M1 in Jhb.

Regards
Alta