Motorcycle racing championships are like a pendulum, flowing back and forth between one rider and another, between one manufacturer and another. One year, Yamaha is on top, the next, it’s Honda. One year, Yamaha manages to exploit the rules best, the next year it’s Honda.

On the evidence of the first two days of testing – scant evidence indeed, but all we have to go on at the moment – conditions appear to favor Honda. With a liter less fuel to play with, and the new tires being introduced by Bridgestone, it looks like the tide is flowing Honda’s way, while Yamaha is set to suffer.

For the Factory Option entries at least; in the Open category, the tide is flowing very firmly in the other direction, with Aleix Espargaro and the NGM Forward Yamaha blowing Honda’s production racer out of the water.

That the fuel reduction would favor the Honda was expected, but the advantage might be bigger than Yamaha would like to admit. After a tough first day of testing, Jorge Lorenzo spent all of Wednesday trying to recover his confidence in the bike, as his crew searched for a setup that would smooth power delivery and give him the precise throttle control his high-lean-angle – and high risk – strategy demands. They were successful, at least in renewing Lorenzo’s confidence in the bike, he told the press.

A change to the electronics gave him the feeling he had with last year’s machine, and he was able to ride more freely. With that change made, he went in search of a fast lap, setting it at around 3:30pm, in the hottest part of the day.

It has been a fascinating first day of testing at Sepang. And like all fascinating days, it has been long, tiring, and utterly inspiring. There were surprises, disappointments, and rumors confirmed and denied. It was, in short, a good day at the office.

Marc Marquez was fastest – it barely goes without saying – the 2013 World Champion picking up where he left off. He was quick from the off, and put in a final burst of speed at the end of the day to open the gap on the rest, finishing with half a second advantage.

Braking stability was the watchword for the Repsol Honda team, especially rear grip on braking and corner entry, with both Marquez and Dani Pedrosa working on a slightly revised version of the 2014 RC213V which both men had tested at Valencia last year.

Their main focus – like those of everyone on their first day back on a MotoGP – was just to get used to the speed again. The switchover had been toughest for Cal Crutchlow, the Englishman claimed. He had ridden a motocross bike for exactly one day, he said, spending the rest of his winter training on his bicycle. The speed differential between a 20-speed racing bicycle and a 6-speed Ducati Desmosedici is nothing if not cavernous.

The happiest faces were at Yamaha, though in different garages and on unexpected faces. Valentino Rossi took the second fastest time, had led for a large part of the test, and looked a much happier rider all round. The rapport with new crew chief Silvano Galbusera was good, the atmosphere in the team was good, but above all, a few small changes which Yamaha had made to the YZR-M1 had proven to be significant.