The official Honda, Yamaha and Ducati MotoGP teams began their final pre-season test at Phillip Island on Monday.
The special test has been arranged to avoid a repeat of last October's Australian Grand Prix tyre problems for the MotoGP and Moto2 classes.
Caught out by the new high-grip asphalt, a compulsory mid-race bike swap was required for MotoGP (Bridgestone tyres), while the Moto2 race (Dunlop tyres) was significantly shortened.
Fresh from their announcement to run under Open class regulations for 2014, Ducati Team riders Andrea Dovizioso and Cal Crutchlow are present, alongside Yamaha Factory Racing's Jorge Lorenzo and Valentino Rossi, plus Repsol Honda's Dani Pedrosa.
Pedrosa's team-mate and reigning world champion Marc Marquez is missing a second test due to the broken leg suffered in a dirt track training accident.
The Marc VDS and Mapfre Aspar teams are in attendance for Moto2.
Testing began at 9:30am and finished at 5:30pm, with a brief red flag period following an accident for Mika Kallio, who was sent for a precautionary X-ray on his left wrist.
Lorenzo, who struggled badly with the revised 2014 Sepang tyres last week, was quickest for much of the day - setting his best lap in the closing stages. Rossi briefly moved up to a late second place, before Crutchlow reclaimed the position. Team-mate Dovizioso was last of the riders to start testing, but still completed 60 laps.
Bridgestone stated: "It's important to note that lap times today aren't indicative of outright pace, the riders used different test tyres at different stages."
Bridgestone has brought two 2013 specification rear tyres and six new experimental tyres with changes to construction, compound and shape.
Testing continues on Tuesday and concludes on Wednesday evening. Bridgestone has requested longer runs of 15 laps or more over the next two days, to gather sufficient information.
The MotoGP teams not testing in Australia will hold their final pre-season outing at Qatar from March 7-9. The final Moto2 test will be at Jerez from March 11-13.
for pictures from the test...
1. Jorge Lorenzo
ESP Yamaha Factory Racing (YZR-M1) 1m 29.213s
[68 laps / 327.3km/h top speed]
2. Cal Crutchlow
GBR Ducati Team (Desmosedici) 1m 29.576s | +0.363s
[68 / 333.3]
3. Valentino Rossi
ITA Yamaha Factory Racing (YZR-M1) 1m 29.730s | +0.517s
[85 / 330.3]
4. Dani Pedrosa
ESP Repsol Honda Team (RC213V) 1m 29.961s | +0.748s
[88 / 327.3]
5. Andrea Dovizioso
ITA Ducati Team (Desmosedici) 1m 29.965s | +0.752s
[60 / 334.4]
6. Esteve Rabat
ESP Marc VDS Racing (Kalex) 1m 32.316s | +3.103s
[100 / 274.8]
7. Nico Terol
ESP Mapfre Aspar Team (Suter) 1m 33.290s | +4.077s
[82 / 274.8]
8. Mika Kallio
FIN Marc VDS Racing (Kalex) 1m 33.440s | +4.227s
[62 / 273.4]
9. Jordi Torres
ESP Mapfre Aspar Team (Suter) 1m 34.000s | +4.787s
[56 / 268.7]
Blue = Factory class - Control ECU hardware, but unique manufacturer software.
20 litres of race fuel, five engine changes for the season. All engines must be identical throughout the year, within the same team (development freeze).
Red = Open class - Full control ECU system, hardware and software.
24 litres of race fuel, twelve engine changes for the season. No engine development freeze, plus a softer rear tyre allocation relative to the Factory class.
Black = Moto2 class.
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Official Phillip Island MotoGP records:
ESP Yamaha 1m 27.899s
Fastest race lap:
ESP Honda 1m 28.108s
Fastest 2013 race laps by other manufacturers:
ESP Yamaha 1m 28.315s
USA Ducati 1m 29.664s
Official Phillip Island Moto2 records:
ESP Kalex 1m 32.530s
Fastest race lap:
Alex de Angelis
RSM Speed Up 1m 32.814s