Two-stroke racing has been living in a four-stroke world, and the death blow to the smokers in GP racing has already been dealt by the GP Racing Commission. With 2012 set to see Moto3 replace 125GP as MotoGP’s introductory class, the FIM has released the full technical specifications of the up-coming, 2500cc, single-cylinder, four-stroke racing class. Designed not only to bring GP racing into the 21st century, Moto3 also aims to end the Aprilia domination that’s currently taking place in the class’s two-stroke predecessor. With companies like Honda and KTM building complete Moto3 machines, and engineering firms like Kalex working on custom chassis for the prototype 250cc engines, there certainly looks to be a bit of diversity coming to the introductory GP series.

Another issue plaguing 125GP, and GP racing as a whole, is the rising costs of competing in the sport, as evidenced by the diminishing grid size in MotoGP. With Moto2 boasting a healthy 40 bike grid, Dorna and IRTA believe they have found the secret recipe to making prototype racing work, and have applied that methodology to the new Moto3 class. Unsurprisingly then, the vast majority of Moto3’s technical regulations concern keeping costs down, especially when it comes to the series’ claiming-rule style engine & parts restrictions. It’s actually interesting to read the level of detail the GP Commission has gone through in order to head-off attempts to circumnavigate the spirit of the cheaper four-stroke series, though we might point out that water always finds its level. Check out the full Moto3 technical regulations after the jump.