Loris Capirossi is hopeful he can cure a vibration problem on his Rizla Suzuki before qualifying for the Valencia Grand Prix comes around.

The Italian set the ninth fastest time during free practice, but was prevented from finishing higher up the timesheets after struggling with an issue on the GSV-R.

Nonetheless, Capirossi, who is embroiled in a six-way fight for seventh position in the MotoGP standings this weekend, worked hard to find a solution, even if he admits it isn't perfect.

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"We had a bit of vibration from the bike today and with only an hour of practice we struggled to find enough time to get the best solution to fix it. We did a couple of setting changes to try and improve it and in the end we found a good situation, but it is still not perfect.

"We have to look at the data to find out what is causing the vibration and try to improve things for tomorrow. I am sure if we can get things right we can be very fast here and have a good end to the season!"

Team-mate Chris Vermeulen, meanwhile, endured a difficult first day after only being able to set the 16th fastest time, seven tenths slower than Capirossi.

"It's been quite cold here in Valencia today and at start of the session I found it quite difficult to get heat into the tyres, which meant I couldn't get them working as well as I would have liked. After we overcame that the bike worked quite well and I started to make my way up the timesheets.

"We made a lot of progress throughout the session even though we came across a couple of issues that made me to lose a bit of track time and possibly caused me to miss out on the period in the session where I could have got my best lap-time. I think we'll be able to get things spot-on for tomorrow and go a lot quicker than we did today.

"I've not been feeling too good this week, but hopefully all's well that ends well and I can get over it quickly and be back on the pace in time for the race."