The weight increase in the MotoGP class introduced for 2012 – from 153kg, as originally agreed when the 2012 regulations were drawn up back in August 2010, to 157kg – has had many repercussions. The addition of 4kg to the 1000cc MotoGP machines has been blamed for causing the chatter that Honda's RC213V suffers from, and for complicating the pursuit of the ideal weight distribution for both Honda and Yamaha, which the two Japanese factories had spent most of 2011 perfecting ahead of the 2012 MotoGP season.
The decision was taken in a Grand Prix Commission meeting held on December 14th of 2011 in Madrid, and though it drew little comment at the time, once the MotoGP paddock reassembled at Sepang for the first test of the year, some intriguing details started to appear. Crash.net's Peter McLaren has an excellent reconstruction of the decision process, from which it is clear that the path to adoption the proposal faced was far more complex than usual. It also reveals some of the underlying tensions in both the Grand Prix Commission and the MSMA which will go on to play a major role in the rule-making process for 2013 and beyond.