Class
Structure
Premier
Open:
Any
Bike
Size
Sport
Moto:
Any
size
bike
Open
displacement
single
standard
wheels
and
full
suspension
travel.
Stock
brake
calipers
must
be
retained.
"Open
traction"
tire
choice.
DOT
tires
are
recommended.
Middleweight
450:
Up
to
250cc
liquid-cooled,
two-stroke
Single
Up
to
400cc
air-cooled,
two-stroke
Single
Up
to
450cc
liquid-cooled,
four-stroke
Single
Up
to
550cc
air-cooled,
four-stroke
Single
Lightweight
250:
Up
to
125cc
liquid-cooled,
two
stroke
Single
Up
to
200cc
air-cooled,
two
stroke
Single
Up
to
250
cc
liquid-cooled,
four
stroke
Single
Up
to
400
cc
air-cooled,
four
stroke
Single
Vet:
Must
be
at
least
35
years
old
—
Open
displacement
Single
Mini:
Up
to
85cc
two-stroke
Single
-
Up
to
160
cc
four-stroke
Single
-
Must
use
a
mini
chasis |