The 2015 MotoGP season kicks off tomorrow. On Wednesday, the riders take to the track once again at Sepang to continue the development on the bikes they will be racing this year, and to test out the new updates the engineers have been working on during the winter break.

And yet the two most important and interesting developments won’t even be at the first Sepang test.

Ducati’s much-anticipated Desmosedici GP15 is not quite ready for primetime, and so will not make its public debut until 19th February at the launch in Bologna, and not make its first laps in public until the second Sepang test at the end of this month.

Yamaha’s fully seamless gearbox – allowing both clutchless upshifts and downshifts – will also wait until Sepang 2 before Valentino Rossi and Jorge Lorenzo get their hands on the bike.

The official reasons given for the delay are that the GP15 and Yamaha’s gearbox are almost ready, but not quite, still needing a few last checks by the engineers before they are ready to be handed over to the factory riders.

Those of a cynical – or perhaps even paranoid – bent may be tempted to speculate that the delays are more to do with the media than the engineering. The first Sepang test this week is well-attended by journalists and photographers alike, the MotoGP press just as eager as the riders and the fans for the winter to be over.

The second Sepang test sees only a very few journalists attend, with few publications willing to spend the money to cover the expenses for what is often just more of the same.

Perhaps the factories have caught on to this, and are taking advantage of the opportunity to test important new parts with a little less media attention. Or perhaps it really is just a case of not being quite ready in time.

Despite the absence of the really big news, there will still be plenty to see. So who will be testing what, and what are the key factors to keep an eye on?