 | Sportsman:
1974 and earlier dirt trackers, divided into
three classes for 0-250cc, 251-600cc and
601-750cc machines.
|
| Classic:
1967 and earlier machines. Classes include
0-250cc and 500cc OHV/ 750cc sidevalve (0-250cc
and Open in TT)
|
| Dinosaur:
1951 and earlier 500cc OHV and 750cc sidevalve
(unlimited displacement in TT).
|
| Seventies Singles:
Post-vintage-era 500cc and smaller
four-stroke machines such as competed in the
late 1970s.
|
| Seventies Singles
+50:
To encourage our 50 and
over riders to try Seventies Singles dirt track
racing, AHRMA's Dirt Track Committee and Board
added a +50 Seventies Singles class. The class
is open to riders age 50 or older on any
Seventies Singles or Seventies Two-Stroke
eligible machine. The class will run at
national and regional dirt track and TT events
beginning with the 2008 race season.
|
| Seventies Two-Stroke:
1981 and earlier air-cooled two-strokes up to
250cc.
|
| Super Senior:
Riders over 60 years of age on any
Sportsman-eligible machines.
|
| Senior:
Riders over 50 years of age on any
Sportsman-eligible machine.
|
| Novice: A
non-championship class run at selected events
for entry-level riders on any Sportsman-eligible
machine. |
