CLASSES FOR 2026

THESE REGULATIONS/CLASSES ARE IN ADDITION TO, AND NOT INPLACE OF, THE ACU TECHINICAL REGULATIONS.

THE ORGANISERS RESERVE THE RIGHT TO IMPOUND ANY MACHINE, ITEM OF EQUIPMENT OR CLOTHING AT ANY TIME AND WITHOUT THE RIGHT OF PROTEST OR REFUND.

OPEN 80CC-450CC
Includes upto 500cc two-stroke machines. This class will run as a standalone championship but share a grid with the Minitwin Championship.

MINITWINS
Any four-stroke minitwin made for road use. This class will run as a standalone championship but share a grid with the 80cc-450cc Championship.

BYRON CUP
Open to all machines up to 500cc and 650cc Minitwins made for road use.

CLASSIC ERA
Open to any 501-1300cc machines manufactured pre-2000. 

EMRA SPORT-BIKES
Modified four-stroke supertwin, with water cooled engine up to 800cc, and Kramer 690, KTM 690, Yamaha 700, Aprilia 660, Suzuki 800 and Triumph 660. Minimum age of 16. 

F900R TROPHY
BMW F900R Roadsters.

CB500
Open to all Honda CB500 and Kawasaki ER500 machines. No slick tyres permitted.

PRE-ELECTRONIC INJECTION
Up to 749cc and 750-1300cc machines. Generic and formula specifications.

OPEN 600CC INCL NEXT GENERATION SUPERSPORT
Open up to 750cc four-cylinder machines. Includes 675-798cc three-cylinder, and 890-959cc twin-cylinder.

EMRA OPEN
Open to all 597cc-1300cc machines. Generic regulations. Rookies eligible.

MALLORY TROPHY
Open class up to 749cc excl Sport-Bikes. And 750-1300cc. Only Clubman & National licences are eligible.

NOVICE/ROOKIES 175CC-1300CC
Rookies who have held a licence for no more than two years are eligible. Riders must not have held an ACU Licence before 1st January 2024. Exceptions to the above date by approval of the Secretary of the meeting. Riders who have passed their ACU CTC/BRA since 1st January 2024 AND who have upgraded to Clubman within this timeframe, will not be eligible. Riders who start the 2026 championship as a Novice and upgrade to Clubman during the season will remain eligible to finish the championship. Riders who finished in the top three of the Championship in 2025 are not eligible. Slick tyres are allowed only if the licence permits.

SIDECARS 590-1000CC (MAY ONLY)
Open to four-stroke three-wheeler outfits upto 1300cc.

ELIGIBILITY 
Eligibility may, on occasion, be granted on a case-by-case basis for machines competing across all championships, provided they are deemed to be within the spirit of the class.

NOVICE RIDERS
All novice and intermediate novice competitors are required to wear an orange vest during all races and practice sessions.

HELMETS
All riders must wear an ACU‑approved helmet with a valid ACU Gold Sticker already affixed before arriving at an ACU‑permitted event. Gold Stickers will no longer be applied at events, and riders without a valid Gold Sticker affixed to their helmet will not be allowed to race. If your helmet is on the ACU approved list but needs a sticker, we recommend you contact the ACU for further guidance on how to obtain one.