Age:- 16+ years
Engine:- 115cc air-cooled TKM engine
Top speed:- 75mph
Weight Limit:- 148kgs
Dry Tyres:- Maxxis SLC
Wet Tyres:- Maxxis F.TKM
Plates:- Red with White numbers
General:- Controlled engine & chassis
regulations, low maintenance

Photo:- 2005 & 2006 F. TKM Extreme N.I.
Champion, Stephen Rutherdale

Age:- 16+ years
Engine:- 4-stroke Briggs & Stratton engine
Top speed:- 75mph
Weight Limit:- 165kgs
Dry Tyres:- Bridgestone YJL
Wet Tyres:- Bridgestone YGR
Plates:- Green with White numbers
Entry:- level category, economic running costs.

Photo:- Northern Ireland Champion, Mark Overend

Age:- 16+ years
Engine:- 2x160cc 4 stroke Honda engines
Top speed:- 70mph
Weight Limit:- 175kgs
Dry Tyres:- Dunlop SL3
Wet Tyres:- Dunlop KT3
Plates:- White with Red numbers
General:- Low maintenance, very competitive.

Photo:- NIKA Chairman & 2007 N.I.
Champion, Robbie Robinson

Age:- 16+ years
Engine:- 125cc water-cooled 'TAG' Rotax engine
Top speed:- 85mph
Weight Limit:- 162kgs
Dry Tyres:- Vega SL6 'JAG'
Wet Tyres:- Vega W2 'JAG'
Plates:- Blue with White numbers
General:- Controlled restrictions, high
performance & ultra competitive.

Photo:- Stuart Lyness, Formula Rotax N.I. champion in 2007

Age:- 16+ years, min driver weight 85kgs
Engine:- 125cc water-cooled 'TAG' Rotax engine
Top speed:- 85mph
Weight Limit:- 177kgs
Dry Tyres:- Vega SL6 'JAG'
Wet Tyres:- Vega W2 'JAG'
Plates:- Green with White numbers
General:- Similar to Formula Rotax Max,
with higher minimum weight limit.

Photo:- N.I. champion in both 2005 & 2006, Gary Ross