Motorsport UK Classes 2022
|
Class |
Number Plate/No. | Weight kg (inc driver) | Ages | Tyres – Dry | Tyres – Wet | Comments |
| Bambino | White/Black | 69 | 6-8 | Le Cont MSA04 | Le Cont MSA04 | Comer C50 MSA homologated 2-stroke engine |
| IAME Cadet | Yellow/Black | 103 | 8-13 | Dunlop SL3 MSA | KT3 Barcoded | 60cc Parilla Gazelle un-sealed engine, clutch, pull starter |
| Honda Cadet | Yellow/Red | 103 | 8-13 | Dunlop SL3 MSA | KT3 Barcoded | GX160 4-stroke budget engine, clutch, pull starter |
| Junior TKM 2S | Blue/White | From 123 | 11-16 | Maxxis TKM Green | F TKM | As TKM with restrictor, optional clutch, optional TAG |
| MiniMax | Yellow/Black | 135 | 12#-15 | Mojo D2 | Mojo W5 CIK | Restricted version of Rotax Junior Max |
| Junior Max | Red/White | 148 | 13-16 | Mojo D2 | Mojo W5 CIK | Junior version of Rotax Senior Max |
| MiniX | White/Black | 136 | 12#-15 | Komet K1H | Komet K1W | Restricted version of X30 Junior |
| X30 Junior | Green/White | 148 | 13-16 | Komet K2H | Komet K1W | Junior version of X30 with restrictor |
| OK Junior | Yellow/Black | 142 | 12-16 | TBA | TBA | Junior version of OK, these are push start karts |
| TKM 2S Extreme | Red/White | From 132 | 16# | Maxxis TKM Green | F TKM | 115cc BT82, optional clutch, optional TAG |
| Rotax Max | Blue/White | 162 | 16# | Mojo D5 | Mojo W5 CIK | 125cc d/drive commercial TAG class (electric start) |
| Rotax Max/177 | Green/White | 177 | 16# | Mojo D5 | Mojo W5 CIK | Heavy-w’t version with 80kg min driver weight |
| X30 Senior | Yellow/Black | 164 | 16# | Komet K2M | Komet K1W | Commercial TAG 125cc IAME engine, not sealed |
| OK Senior | Yellow/Black | 152 | 16 | TBA /TBA | TBA / TBA | International & British Championship |
| Formula Libre & Clubman | Various | 16# | Various | Various | Catering for economy or minority classes such as Honda Junior and Senior, World Formula and older engines | |
|
KZ2 |
Yellow/Black | 175 | 16 | Le Cont LP |
Le Cont LW CIK |
International & British Championship 125cc gearbox class |
| KZ UK | Green/White | 180 | 16 | Le Cont LP | Le Cont LW CIK | 125cc reed valve 6 gears with 30mm carburettor |
| 250 National | White/Black | 195/200* | 16+ | Dunlop,Vega all CIKOption | Same makes as Dry | Motocross 250cc single cylinder engines, 450 4-stroke and 175 IAME 2-stroke options, 125 Open may race in this class |
Key: + means 17 years minimum for long circuit racing. 2S: 2-stroke engine; 4S: 4-stroke engine (Classes are 2S unless otherwise shown)
# means year of the birthday. OK Junior driver must hold a National A licence.
Many class regulations call for specific tyre markings on the tyres e.g. ABKC, JAG, MSA, GB etc, See Kart Race Yearbook.
Junior classes have a minimum driver weight, for safety reasons. Junior TKM 38kg & MiniMax 39, Junior Max, 42.5, and seniors for under 16’s.
Junior Max & Junior X30 may race in year of 13th birthday for experienced drivers
*250/210 Gearbox has two weights, one when short circuit or no bodywork is fitted, the heavier for when wings or long circuit bodywork is fitted.
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