Racing Classes
NEW FOR 2026:
BMCRC Open 500
The Open 500 will be split into two sub-classes – one for 2-Strokes and one for 4-Strokes. The only real rule? Engine capacity is capped at 500cc (standard manufacturer oversizes are fine). That’s it. Simple, open, and flexible – the way club racing should be.
- 4-Stroke Class: F400s are still very much welcome, along with bikes like the Honda CB500, Kawasaki Ninjas, and the new BSB Junior Sportbike models (which fit the capacity limits).
- 2-Stroke Class: Expect to see some classics here – TZ250s, TZ350s, RSs, KRs – proper old-school racing kit back out on track where it belongs.
ACU Thunderbike 500
Supported by: SF Parts
After a successful first year for CB500s at Bemsee there’s been even more interest. We have chosen to refine the weight classes from ’25 – so now 2026 will feature: Class 1 – Lightweight Sub 90kg, Class 2 – Middleweight Sub 105kg, Class 3 – Heavyweight 105kg plus
This class will have an exclusive grid. There will also be a Rookie Championship bridging across all three sub-classes.
The overall ACU Championship for this class will be based on the first 3 over the line - irrespective of sub-class.
Dunlop Controlled Tyre.
Regulations are published HERE
BMZRC 250 MZ
The ultimate budget class with a great family friendly paddock. This class may use any tyre treaded or slick and is run in accordance with the BMZRC technical specifications. Much more info on the MZ Racing Club’s own site at www.bmzrc.net
Runs with TGJC/Senior Ninjas........
ACU Team Green Junior Cup/Senior Ninja Series
Series for 13-18 yr olds on the Kawasaki Ninja 300 or 400 twin, 4-stroke. Special Ninja 400 package available via Kawasaki, sealed engines, over 9 rounds. Novice, Clubman or National licence holders’ eligible.
Dunlop controlled tyre. Ninja 250’s from 2012/3 also eligible, some available second hand….
Interested riders/parents teams should email the Bemsee office ( mikedommett@hotmail.com ) to register interest in order to receive a 2026 Series information pack, when available.
CONTINUED FOR 2026: Senior Ninja Series
So many riders (and Dads) said they’d love to race the kid’s 300 or 400 bike – now’s your chance Identical package to the Juniors, buy a bike and race! Will run alongside the Junior grid. Contact mikedommett@hotmail.com to get things moving.
BMCRC F1 & F2 Sidecars
If 3-wheels take your fancy and there’re two of you we’ll put you in touch with reps from this class who can help you get started. A unique breed of racers this and the Bemsee paddock is more the richer for them. With National and World competitions converting to 600cc engines throughout, we will maintain the availability of a max 1000cc F1 Long Chassis class Championship for 2026 alongside a short chassis 600 F2 class.
DART MRO 600 & Clubman 600
A class that mixes Stock 600’s and Supersport 600 tuned machines competing for a single title.
2026 will allow the ‘new breed’ of Next Generation Supersport bikes to integrate into current 600 club racing without advantage or the need for expensive electronic/tuning packages…a max of 130 BHP will apply to all bikes in the series
Features a “600 Clubman Championship” open to Clubmen licence holders only, stock or tuned.
Clubman do not score in the main Championship. Meeting Format: MRO 600 runs one qualifying session to set the grid for race 1.
The Class has voted to have three races over the weekend. Here the first race (on Saturday at most events) Will be a longer length race compared with other classes the second day of racing being the standard 2-race format. Subsequent races grids set according to fastest lap scored in previous race.
The 765 machines are eligible for MRO and Clubman 600
Rules now published HERE
MRO Minitwins
Supported by Properly Protected Insurance
The biggest dedicated Minitwin grid in the UK! Predominantly the Suzuki SV650. 16 yr olds
Can be on an ACU Novice or Clubman Licence, 15yrs on a National Licence.
Rookies will run in with the main MRO Class
This class must use Road Legal tyres except when a wet race has been declared.
BMCRC SuperTwins
Runs in with Thunderbike Sport as a separate championship, started in 2023 and continues with support from TW Suspension
Any four-stroke twin cylinder motorcycle available for purchase to the general public for road use with a water-cooled engine of up to 800cc may be used (see details for rules in Downloads section)
Any motorcycle compliant to MCRCB National Sportbike Championship is eligible to Compete in BMCRC Supertwins
SuperTwins - continues in 2026 - Regulations TBC
MRO Powerbikes & MRO Clubman 1000
Open to all 1000cc bikes, Stock or Tuned competing for a single title.
Features a “1000cc Clubman Cup” open to Clubmen licence holders only, stock or tuned.
Meeting Format: runs one qualifying session to set the grid for race 1.
The Class has three races over the weekend with a long race on Sunday. Subsequent races grids set according to fastest lap scored in previous race.
AND CONTINUING FOR 2026: MRO RETRO 1000
For older 1000s:
Yamaha R1 – Up to 2011 Honda Fireblade – Up to 2016 Kawasaki ZX-10 – Up to 2010 Suzuki GSXR-1000 – Up to 2016 These are all ‘Pre Electronic’ so no riders aids like traction, Launch and anti-Wheelie control.
Separate Championship - does not score in Powerbike or C1000 series in 2026
L&W Contractors BMCRC Rookie 600s
This class is where many start their careers. All riders will be first year novice licence holders. You need to check the ACU Licence regulations to ensure your proposed bike is allowable…..
Novice riders in 2026 will be limited to Supersport / Formula 600/636/675 machines (not Next Generation) or Sportbike (as defined by BSB regs) machines above these capacities, or lesser capacity machines.
It’s trackcraft you’ll be learning as in the hands of a talented rider any bike can go quick. You’ll have the option to use treaded or slick tyres. Rookie 600s are planned to run with the Thunderbike Ultra & Extreme grid in 2026
BMCRC Thunderbike Sport & Thunderbike Extreme & Thunderbike Ultra
Supported by The Clothing Kings, Steve Jordan Motorcycles & TBR Performance
The only Power to Weight Ratio series in the UK…
A power to weight ratio restriction applies here covering Singles, twins, triples & fours which are all eligible for this class. You may use any tyre, treaded or slick. Technical Regs for 2026 are below. This class includes a Thunderbike Extreme section too with a slightly higher P-W ratio. Details here.....
Ultra & Extreme run on the same grid - Sport is separate with Bemsee SuperTwins
Thunderbike Regulations and the Thunderbikes - Eligible Bikes List can be found in this section
DFDS Seaways Yamaha Past Masters
Budget racing on the great Yamaha LC, TZR and YPVS bikes of the 80’s and early 90’s. The YPM class has developed into a special group in the Bemsee paddock. This class uses treaded tyres. Trophies for Clubman riders on all races.
