Jorge Lorenzo admitted his surprise at the extent to which he struggled on day one of the Czech Republic GP weekend. The World Champion finished the day seven tenths off the pace in fourth behind factory Honda riders Dani Pedrosa, Casey Stoner and Marco Simoncelli.

Speaking after the second session, Lorenzo admitted the Yamaha team have a lot of work to do if they're going to challenge for pole position tomorrow.

“Today's sessions have not been exactly as we expected. We are struggling a bit on braking and we lose too much time over the lap. Tomorrow we will work hard to improve the bike in the morning to be ready for qualifying because at this moment we are pretty far from the front.”

Teammate Ben Spies was half a second further back in sixth and the American's problems weren't limited to the YZR-M1, with numbness in his left arm also hampering him.

“It was an ok day for us, I'm actually pretty happy with the results. I've got a little bit of a pinched nerve in my neck and I'm struggling a little bit on the bike but I'm still giving it 100%. Lap times aren't too bad I'm just not able to put too many laps together in a row. We're going to do a lot of physio over the next couple of days to get it where it's comfortable for the race and I'm pretty optimistic about how we can turn things around for Sunday.”

Team Director Massimo Meregalli is hopeful that Spies will be able to push harder tomorrow following some treatment, and was slightly more optimistic than Lorenzo about the team's chances for qualifying.

“The bike set up is working quite well for Ben at the moment but he has a problem with his left arm which is preventing him from pushing hard. Apart from this he is reasonably happy with the tyres and set up and progress. He is going to have some therapy tonight and tomorrow with the Clinica Mobile and we will see how much he can push on Sunday. Jorge has made a good start to the weekend, but is still looking to resolve some front end issues to improve his set up for Sunday.”