Andrea Iannone set the fastest lap time during Friday free practice for the 125cc Japanese Grand Prix at Motegi.

The Italian, who took victory in the rain-shortened Losail season opener - for which half points were awarded - held off pre-season favourite and Qatar rival Julian Simon by 0.179sec with Stefan Bradl third and Esteve Rabat fourth.

Nicolas Terol made it an all-Aprilia top five, with Dominique Aegerter sixth for the Ajo Derbi team. Simon's Aspar Aprilia team-mate Bradley Smith was seventh fastest and the final rider within one second of Iannone.

Friday practice - Motegi:

1. Iannone (Aprilia) 2min 0.685sec
2. Simon (Aprilia) +0.179sec
3. Bradl (Aprilia) +0.344sec
4. Rabat (Aprilia) +0.687sec
5. Terol (Aprilia) +0.864sec
6. Aegerter (Derbi) +0.880sec
7. Smith (Aprilia) +0.923sec
8. Espargaro (Derbi) +1.096sec
9. Cortese (Derbi) +1.112sec
10. Marquez (KTM) +1.183sec

13. Webb (Aprilia) +1.952sec
16. Redding (Aprilia) +2.600sec
36. Hoyle (Haojue) +8.597sec