S.D. Codified Laws § 32-18-27
Brake inspection of motor-driven cycle
The Department of Public Safety is authorized to require an inspection of the braking system on any motor - driven cycle and to disapprove any such braking system on a vehicle which it finds will not comply with the performance ability standard set forth in §§ 32-18-8 and 32-18-9 , or which in its opinion is equipped with a braking system that is not so designed or constructed as to ensure reasonable and reliable performance in actual use.
Source: SL 1967, ch 197, § 4 (a); SL 1968, ch 178, § 4; SL 2003, ch 272, § 121.