Following Sunday's Valencia MotoGP season finale, an official test session is being held at the circuit from Monday to Wednesday.

The test marked Cal Crutchlow's Ducati debut and Moto2 world champion Pol Espargaro's first ride with Monster Yamaha Tech 3.

Espargaro's injured title rival Scott Redding - who previously rode some MotoGP test laps for Ducati - was making his official premier-class debut with Gresini and the new 'Open' class Honda Production Racer.

The RCV1000R was also on track in the hands of Aspar's Hiroshi Aoyama - team-mate and former Ducati star Nicky Hayden will wait until Tuesday due to limited machine numbers.

Likewise the new Forward Yamaha - to be ridden by Aleix Espargaro and Colin Edwards - was not ready in time for Monday.

Also absent was newly crowned world champion Marc Marquez, who like Repsol Honda team-mate Dani Pedrosa took a well-deserved day off.

But there was no rest at the Factory Yamaha team where both Jorge Lorenzo and Valentino Rossi were on track, using the present M1 alongside the 2014 prototype.

Lorenzo, who missed out on the 2013 crown by just four points, lapped comfortably under Pedrosa's new official race lap record to lead day one of the test. Lorenzo and Rossi set their best lap times in the closing minutes.

Rossi was working with his new crew chief Silvano Galbusera for the first time, while former Aprilia Racing boss Gigi Dall'Igna was present in his new role as general manager of Ducati Corse.

The 2014 rules will see the Factory class bikes lose a further litre of race fuel relative to the Open class machines, raising the difference to four litres. The Open bikes must run the full control ECU system, while the Factory entries can use their own software.

Monday's test took place from 12-5pm, with a full day of testing available on both Tuesday and Wednesday.

CLICK HERE for more pictures from the test...

1.Jorge LorenzoESP Yamaha Factory Racing (YZR-M1)1m 31.257s(Lap 46/48)
2.Valentino RossiITA Yamaha Factory Racing (YZR-M1)1m 31.350s(41/42)
3.Stefan BradlGER LCR Honda MotoGP (RC213V)1m 31.751s(25/40)
4.Andrea IannoneITA Energy T.I. Pramac Racing (GP13)1m 31.925s(46/49)
5.Andrea DoviziosoITA Ducati Team (GP13)1m 31.943s(30/36)
6.Cal CrutchlowGBR Ducati Team (GP13)1m 32.054s(36/39)
7.Michele PirroITA Ducati Test Team (GP13)1m 32.698s(26/32)
8.Yonny HernandezCOL Ignite Pramac Racing (GP13)1m 32.745s(33/37)
9.Hiroshi AoyamaJPN Power Electronics Aspar (RCV1000R)1m 33.020s(38/38)
10.Pol EspargaroESP Monster Yamaha Tech 3 (YZR-M1)1m 33.187s(32/45)
11.Scott ReddingGBR Go&Fun Honda Gresini (RCV1000R)1m 34.195s(31/34)
12.Michael LavertyGBR Paul Bird Motorsport (PBM-ART CRT)1m 34.378s(16/17)
13.Martin BauerAUT Remus Racing Team (S&B Suter-BMW CRT)1m 35.115s(22/27)
14.Mike Di MeglioFRA Avintia Racing (FTR-Kawasaki)1m 36.304s(19/26)

Official Valencia MotoGP records:Best lap: Marc Marquez ESP Honda 1m 30.237s (2013)Fastest race lap:Dani Pedrosa ESP Honda1m 31.628s (2013)

Fastest 2013 race laps by manufacturer:Dani Pedrosa ESP Honda1m 31.628sJorge Lorenzo ESP Yamaha 1m 31.701sNicky Hayden USA Ducati 1m 32.764sAleix Espargaro ESP ART 1m 33.323sHector Barbera ESP FTR-Kawasaki 1m 33.551sDanilo Petrucci ITA Suter-BMW 1m 34.153sBryan Staring AUS FTR-Honda 1m 34.815sDamian Cudlin GBR PBM-ART 1m 35.886s