2019 AHRMA Handbook: Approved Update to Rule 10.4.3 Classic Sixties
10.4.3 Classic Sixties - updated verbiage: Triumph T100 unit-construction. Triumph unit-construction twins must include the following: The cylinder head must [...]
10.4.3 Classic Sixties - updated verbiage: Triumph T100 unit-construction. Triumph unit-construction twins must include the following: The cylinder head must [...]