Movistar Yamaha's Jorge Lorenzo said his time came as a surprise as the two-time premier class world champion ended the day in second place and only 0.037s behind Marc Marquez.
Lorenzo enjoyed a spell at the top the FP1 times in the dry until Marquez took over at the half-way point, but there was little between them at the finish.
“While riding in the dry conditions this morning I was quite surprised by our performance. It was good from the beginning but I felt that we had a lot of things to adjust, so the margin for improvement was high,” said Lorenzo, whose best lap was a 1m 56.840.
“Unfortunately it rained in the afternoon. In those conditions we are still quite far from the fastest. We need to work on our set-up for the wet, because it seems like it's going to rain tomorrow, but not on Sunday.
“We want to be fast tomorrow if it rains; in case of dry conditions I think we are quite good.”
Lorenzo was seventh fastest in the wet FP2 with a time of 2m 09.114s.