 | Historic 125: Certain 125cc
and smaller motorcycles built up to and including the
1977 model year as the first-generation of long-travel
machines. |
| Historic 250: Certain
126-250cc motorcycles built up to and including the 1977
model year as the first-generation of long-travel
machines. |
| Historic 500: Certain
325-460cc two-strokes and four-strokes up to 636cc built
up to and including the 1977 model year as the
first-generation of long-travel machines. |
| Historic Four-Stroke: Certain
four-stroke machines built up to and including the 1978
model year with up to 636cc. Overhead cam machines are
limited to 500cc. |
| Gran Prix 125: Certain
post-1977 motorcycles up to 125cc. |
| Gran Prix 250: Certain
post-1977 motorcycles 126-250cc. |
| Gran Prix 500: Certain
post-1977 motorcycles 325-500cc two-stroke and up to
580cc four-stroke. |
| Gran Prix Four-Stroke: Certain
185-580cc four-stroke motorcycles that came just after
the Historic Four-Stroke period. |
| Ultima 125: Certain
motorcycles up to 125cc that do not have disc brakes or
power-valve type mechanism built directly into the
engine. |
| Ultima 250: Certain 126-250cc
motorcycles that do not have disc brakes or power-valve
type mechanism built directly into the engine.
|
| Ultima 500: Certain 325-580cc
motorcycles that do not have disc brakes or power-valve
type mechanism built directly into the engine.
|
| Ultima Four-Stroke: Certain
200-580cc four-strokes that were produced either with a
single-shock rear suspension or a newer engine
technology. |
| Open Age: Any AHRMA-eligible
rider on any eligible machine. |
| +40: Riders over age 40 on any
eligible machine. |
| +50: Riders over age 50 on any
eligible machine. |
| +60: Riders over age 60 on any
eligible machine. |
| Women: Female riders on any
eligible machine. |
