"It's just hard when we only have six bikes out there trying to lay down rubber, but it is getting better and better. Once we get more bikes on the track when we're back here, obviously the 250s and the 125 will be out on the track, so the grip will be back to normal in September.

"There's a couple of little changes once we come back here, but it's really just going to be reference points," Spies declared. "I think the track is going to be a work in progress, and it's only going to get better. Everybody here is really positive on doing that."

Also present at the test was Suzuki's 1993 500cc world champion Kevin Schwantz.

"I think the layout is great, and for the spectators to come here to the United States and see for the first time 125s, 250s and [MotoGP] all together here at the Indianapolis Motor Speedway - the mecca of motorsports - is just great," he enthused. "We talk about racing inside an oval or at a speedway and it's typically not a very well laid-out venue, and this track has gone to all expenses and have cut no corners to try to make this the best possible motorcycle event here in the United States."