CRMC Eligibility 

This is a summary of the groupings and classes of motorcycles racing in the CRMC Championships and machines eligible for CRMC races and parades.  
 
AGE AND TYPE OF MACHINES 
Machines considered in the following groups will normally be of a type raced in Europe in the relevant period. Other machines that do not meet this criterion may be referred for inclusion by the CRMC committee 
 
GRAND PRIX 
Thoroughbred machines as raced in Grand Prix, TT and certain short circuit racing. 
 
CLUBMAN 
Machines built for racing and of a type raced during the period (as defined below) using as a basis engines not qualifying for Grand Prix together with certain machines which do not meet Sports or Production specification. Included in Post Classic is the Air-Cooled Class for machines up to 500cc 
 
SPORTS (CLASSIC) & PRODUCTION (POST CLASSIC) 
Essentially unmodified production road and sports machines. 
 
SUPERBIKE (POST CLASSIC) 
Machines 501cc and above built for racing and of a type raced during the period (as defined below) using as a basis engines not qualifying for Grand Prix together with certain machines which do not meet Production specification. 
 
750 SUPERSTOCK (POST CLASSIC) 
Post Classic 750 Superstock is designed for 750cc production based machines manufactured and raced pre 1987, such as the Yamaha FZ750 and Suzuki GSXR750.  
 
PARADE-ONLY 
Machines solely for Parade use which in the opinion of the management committee will add variety and interest to CRMC parades even though they might not specifically meet the eligibility requirements. Such machines will not normally be eligible for racing. 
Machines will be sub-divided into age classifications (or periods) as detailed below: 
 
CLASSIC 1 (previously Period 1) 
All machines = 1st January 1945 and 31st December 1963 
 
CLASSIC 2 (previously Period 2) 
Four stroke machines 
= from 1st January 1964 to 31st December 1972 
Two stroke machines 
= from 1st January 1964 to 31st December 1967 
 
POST CLASSIC 1 (previously Period 3) 
From 1st January 1973 for four stroke machines to the date stated below according to engine size 
From 1st January 1968 for two stroke machines to the date stated below according to engine size 
100cc up to 125cc single or twin cylinder = 31st December 1986 
126cc up to 250cc single or twin cylinder = 31st December 1984 
251cc and above single, twin, triple, or four cylinders 
= 31st December 1981 
 
POST CLASSIC 2 (previously Period 4) 
126cc and above single or multi-cylinder machines 
= from January 1st 1982 to December 31st 1986 
 
Note: Any 50cc or 125cc Grand Prix machine, 
whether two or four stroke, is eligible for Classic if constructed before 31st December 1972. 

CRMC Championships - Find out more about the CRMC classes and championships  

We do our best to fill the grids with compatible machines that will be competitive against each other. Obviously, this very much depends on the machines that enter each individual race event but we think you'll find that a good mix and variety of machinery makes for good, close and competitive racing at CRMC events.  
If you need any help or want to chat about which group or class to enter, please either contact one of the Eligibility Officers or the Class Representatives (usually a CRMC member who races in this class) 

Classic Grand Prix 

CRMC Classic Grand Prix
Thoroughbred racing machines built for Grand Prix , TT and certain Short Circuit racing. Classic 1 - 1945 to 1963 Classic 2 - 1964 to 1972 (1967 for 2-strokes) 
05a - Up to 500cc Classic GP & Clubman by invitation  
10a - ACU Classic 500cc Championship 

Classic Clubman 

CRMC Classic Sports
Machines built for racing and of a type raced during the classic period, using engines that do not qualify for Grand Prix, together with certain machines that do not meet other GP specifications classic sports 
04b - Classic Up to 350cc & Rider 55yrs or over 
05b - Classic Clubman 351cc - 500cc 
06a - Classic Formula 750cc (Maximum 780cc) 
07c - Classic Clubman 251cc - 1300cc 
10c - King of the Classics (for larger machines) 

Classic Sports 

CRMC Classic Sports
Production road and sports motorcycles of a type used for production racing in the classic period, not having a frame and engine from different manufacturers 
02a - Up to 200cc Classic Four Strokes 
03a - Up to 250cc Classic European & Four Stroke Twins 
04a - Up to 350cc Classic European 
04b - Classic Up to 350cc & Rider 55yrs or over 
04c - Up to 350cc Classic Twin & Multi-Cylinder 
04d - Up to 350cc Classic BSA Goldstars 
05b - Classic Clubman 351cc - 500cc 
05c - Up to 500cc Classic BSA Goldstars 
06a - Classic Formula 750cc (Maximum 780cc) 
07c - Classic Clubman 251cc - 1300cc 
10c - King of the Classics (for larger machines) 

Classic Sidecars 

CRMC Sidecars
Sidecars are classified by capacity into Period 1 Production Based 750cc, Period 2 Multi's and Specials 750cc and Period 3 Open Class up to 1300cc 
01a - Sidecars - P1 
01b - Sidecars - P2 
01c - Sidecars - P3 
01d - Sidecars - P4 (Invitation only) 
Close motorcycle racing at CRMC

Post Classic Clubman 

CRMC Post Classic Clubman
Machines raced in the period using production-based engines fitted in either race-specific chassis or production chassis not qualifying for Grand Prix. Unrelated engine and chassis combinations are not permitted. 
08c - Post Classic 1 & 2 750cc Clubman 
08d - Post Classic 1 Up to 500cc Air-Cooled 
08h - P/Classic 1 Up to 250cc A/Cooled & Classic Twins Up to 250cc 
 

Post Classic Grand Prix 

Thoroughbred racing machines built for Grand Prix , TT and certain Short Circuit racing. Post Classic 1 - 1972 to 1981* (1967 on for 2-strokes) Post Classic 2 - 1982 to 1986 *some later cut-offs apply. 
09a - Post Classic GP1 Up to 250cc 
09b - Post Classic GP1 Up to 350cc 
09d - Post Classic GP1 125cc (Piston-Port) 
09e - Post Classic 1 & 2 125cc Open 
10c - ACU Post Classic Championship/King of the Classics 

Post Classic Superbike 

Machines 501cc and above built for racing and of a type raced during the post-classic period using as a basis engines not qualifying for Grand Prix together with non-Production machines. 
08a - Post Classic Superbike 1 & PC1 500cc Grand Prix 
08b - Post Classic Superbike 2 & PC2 500cc Grand Prix 
10c - ACU Post Classic Championship/King of the Classics 

Post Classic Production 

CRMC Junior Production
Production road and sports motorcycles of a type used for production racing in the classic period, not having a frame and engine from different manufacturers 
08e - Production Up to 600cc F/Stroke & 350cc T/Stroke 
08f - Production 601-1300cc F/Strokes & over 350cc T/Strokes 

Post Classic Superstock 

Post Classic Production
Post Classic 750 Superstock is designed for 750cc production based machines manufactured and raced pre 1987 
08k - Post Classic Superstock