Nicolas Terol maintained his advantage in the 125cc class in final practice for the Indianapolis Grand Prix but the session ended in concern for the championship leader. The Spaniard took three tenths of a second off his Friday benchmark but seconds after doing so, his Aprilia ground to a halt, reminiscent of the incident that cost him a potential victory at Brno.

Once again, title rival Johann Zarco was the greatest threat to Terol with the Frenchman halving the gap to the provisional pole man, getting to within 0.313s. Sandro Cortese claimed third to set-up a repeat of the three-way battle for the front of the grid in the Czech Republic while Maverick Vinales will also be keen on challenging for pole. The 16 year old calmly made progress on his first visit to Indianapolis and eventually made it up to fourth.

Fellow rookie Miguel Oliveira beat Hector Faubel to fifth and was trading times with Zarco at one point. The Portuguese teenager provided some welcome cheers for the Andalucia Banca Civica squad after teammate Alberto Moncayo crashed earlier in the session. The Spaniard was the fastest man on track at the time but his lack of activity at the end saw him fall to 11th.

After a bright start to the weekend, Efren Vazquez has seemingly lost that early momentum and finished this morning's session in seventh. Sergio Gadea was next up in eighth ahead of Jonas Folger and Adrian Martin on the third Aspar Aprilia.

Danny Kent finished just outside the top ten in 12th while Danny Webb's session was curtailed by a crash. The Mahindra rider was in the top ten himself before losing control at turn four and dropped back to 14th. Harry Stafford finished 23rd while Taylor Mackenzie was 28th quickest.