A quick look at the Moto3 rules for the 2012 season:

  • A rev limit of 14,000 rpm. Bore size limited to 81mm.
  • Eight engines per rider for the full season.
  • A maximum of four valves, and a single ignition driver. Variable-length inlet tracts are not allowed.
  • Hydraulic or pneumatic valve systems are banned, as are fly-by-wire throttle systems
  • Camshaft drive must be by chain rather than gear.
  • Variable valve timing or valve opening are banned.
  • Direct injection is not allowed, and fuel pressure maximum is five bar.
  • The maximum price of the engine, including special parts or service contracts, is 12,000 euros.
  • Engine manufacturers must be prepared to supply a minimum of 15 riders.
  • Engine updates or upgrades must be available to all customers at the same time.
  • Six gears maximum, with a maximum of two alternate ratios for each gear. Two alternate primary drive ratios are permitted.
  • A control ECU will govern ignition and fuel injection, and include a rev limiter. Tuning options will be included in the supplied software, and the organisers can swap ECUs at any time; standardised data-logging systems must be used.
  • Chassis must be prototypes, with a minimum total weight of motorcycle and rider of 148 kg.
  • Carbon brakes are banned, as are active and semi-active suspension systems, which must use steel springs.