Classic Superbike Racing-CSBR
2019 Rules & Regulations
Pre Season rule's Revision (version 1[Feb 14 2019]):
This class is for machines built up to and including 1983 with exceptions** allowed where
production continued unchanged, and is open to Air Cooled production based machines.
SUPERBIKES will be required to conform to a race preparation standard' (correct Head light
bucket and tail light lens is desirable). All CSBR race bikes and competitors must have
machinery capable of passing technical inspection at any time during a race weekend.
If you have any doubt of legality or admissibility please contact CSBR technical
services for direction and parts/component eligibility.
email@example.com or firstname.lastname@example.org
CSBR PERIOD SUPERBIKE:
SUPERBIKE: 1100cc four strokes, 750cc four strokes, unlimited four stroke twins.
ENGINES: Naturally aspirated "Air Cooled", 4 stroke, production based engines. Engine cases
must be OEM. No restrictions to bore, a maximum engine displacement of 1170cc, (this will be
reviewed in the future to help stabilize rules with other Vintage racing series) 750cc based race
bikes with original engine cases and crank, no restrictions on displacement. Air Cooled twins
have NO restrictions to engine specification. (NO water cooled engines of any type, regardless
of year)TRANSMISSIONS: No restriction on transmissions or clutch.
CARBURETORS: Must be of style and type used in the period to a maximum of 35mm round
slides, period correct flat slide to 33mm allowed. 750cc based racers no restrictions on size,
period correct carburetion required.
IGNITION SYSTEMS: No restriction.
EXHAUSTS: Must be of a racing style in use during the period. Stainless steel allowed as are
aluminum "cans". No carbon fiber or titanium.
FRAMES: Original or copies of period factory frames or exact replicas can be used. Frame and
bodywork must be from the same manufacturer as the motor.
SWING ARMS: Period looking and braced swing arms, Steel or Aluminum will be allowed. No
Mono shock conversions. Mono shock bikes are restricted to original equipped swing
arm/linkage (Bracing and modifying for tire clearance is acceptable.)
FORKS: To a maximum diameter of 41.5mm. Anti-dive and external adjusters allowed. Post
period forks meeting these restrictions will be accepted. Aftermarket fork braces of any type
and style, similar to those available in the period, are acceptable.
REAR SHOCKS: Must be of a style and type in use during the period. Remote and external
reservoirs are allowed. Mono shocks allowed where originally fitted. Any available shock is
acceptable, (however period looking shocks are preferred)
WHEELS: Front minimum diameter 16", maximum width 3-1/2". Rear minimum diameter 17",
maximum width 5:00". Construction to be mag style, magnesium alloy or cast aluminum, Post
period wheels will be accepted.
BRAKES: Maximum of 4 Pistons per caliper allowed
(period correct), fixed or full floating rotors as used in the period, 320mm/13" maximum
diameter, any master cylinder (SAFETY is the most important part of the allowable brake
TIRES: No Restrictions. Radial tires are permitted (Race spec DOT's, slicks and rain slicks
BODYWORK: As used by the factory for the model being run (Motor, Frame Body work must
be from the same manufacturer or close replicas), All attempts should be made to have your
race bike look ERA correct in fit, finish and appearance no modern fairings or seat units
(Some exceptions may be allowed)
HANDLEBARS: Superbike bars must be attached to the top yoke. Clip-ons can be used where
FOOT CONTROLS: Must be of the "rear set racing style", defined as having the foot peg
mounted on or behind the centre line of the swing arm pivot.
SAFETY: Oil retention devices are mandatory, must hold 3 Liters of liquid made of metal or
high quality glass fiber. Brakes and components: though an attempt should be made to keep
all racing motorcycle's period correct, modern braking components (lines, master cylinders,
fluids) are encouraged. Safety/Lock wire: To modern race series specifications.
WEIGHT: Inline 4 cylinder 4 strokes – minimum 400lbs
Inline 4 cylinder 750 based – minimum 375lbs
Twin Cylinder – no restriction
NUMBER PLATES: White Number plates with black numbers are preferred; Red on white will
BRAKE GUARDS: Brake Guards are not mandatory but are strongly recommended and
SHARK FINS: Shark Fin foot protection from Chain drive is NOT mandatory but is highly
recommended and preferred.
RACING IN THE RAIN: If CSBR Participants choose to run in the rain, a rear Taillight would be
required as per CSBK Rules. Nothing elaborate is required. Battery Operated L.E.D. rear
Taillights will suffice the requirement. The Lights can be obtained at the CSBK events via Bickle
TRANSPONDERS: Transponders are Mandatory and are required if you want to be SCORED.
YOU must supply your own Transponder in order to Race with the CSBK/CSBR events. X2
The following examples and exceptions are permitted in CSBR Superbike class.
BMW R90S, R100S
Ducati - 900SS
Honda - 750F, 900F, CBX1000, CB1100R
Kawasaki - 900 1000, 1100 including Mono Shock bikes
Moto Guzzi - 750S, 850, 1000LeMans
Suzuki - GS1000, GS1100, ES/S including mono shock bikes
RE: Twin Cylinder motorcycles, CSBR's primary goal is to represent the Golden era of super
bike racing (1976-1982) and project racing motorcycles in appearance as closely as possible to
what was used in the day. It's a fact that Ducati, BMW and Moto Guzzi played a major role in
the growth of super bike racing in the early days of AMA competition. With this in mind we
welcome all "Air Cooled" twin Cylinder racing motorcycle to join CSBR, we will work closely
with competitors to insure that their bike's meet the current established rules, we will also try
our best to accommodate later twins which fit our primary objective (representing what was
raced in the era [76/82]). Thou it will be up to the competitors to insure their motorcycles fit
the rules in both mechanical requirements and appearance, CSBR will continue to attempt to
make room for all motorcycles that fit this criteria we will also continue to adjust rules as
required to ensure an equal field of competition.
Motorcycles that are found to be Illegal as to the above rules due to component violations
pre or post race will be disqualified and points as well as any purse monies will NOT be
The decision of the CSBR Race Director is FINAL; there will be no grievance process.
Dean F Ruston
Marketing Director/Race Director- CSBR
Technical Director- CSBR