There are a number of FZR Yamaha engines, the most popular being the EXUP, but some teams utilised the R1, Thunderace and Genesis series engines. Although the original factory built R1 crankshaft has proved to be fragile when raced on the grass, these have been strengthened and are now becoming increasingly popular. The Gary Jackson Team uses both EXUP and Genesis series engines. The fuel of choice is Methanol, also referred to as Wood Alcohol or Methyl Alcohol, a highly poisonous, colourless liquid which is less volatile than petrol. Although carburettor jet sizes have to be significantly increased to cope with this fuel, it has one main advantage over petrol.
Methanol burns at a much lower temperature compared to petrol.
The original engine oil coolers can be removed and much smaller radiators can be employed, typically off of a 350cc road bike. Thus reducing overall weight. All gearboxes are the standard factory designed and built units. But the sport tends to use 2nd and 3rd gear only. 1st removed, which acts as neutral.