Reigning champion Max Biaggi insists there is plenty of work to be done on the chattering Aprilia RSV-4, despite ending the first day of action around Phillip Island in an encouraging fourth position.

The Italian begins the defence of his 2010 WSBK crown on the back of an admission that he doesn't expect to fare well at Phillip Island, insisting the RSV-4 is not well suited to the sweeping Australian circuit.

It is a claim that Biaggi proved to some extent during FP1 and Q1 as he battled set-up issues to cure an onset of chatter when pushing on.

Despite this, Biaggi was still fourth fastest at the end of Q1, though he says the advantage is most certainly with Carlos Checa at this time.

"We still have a lot of work to do," he said. "There are problems with the engine brake which triggers a very marked chattering. We tried different solutions, even changing bikes often, but we haven't had any great advantages. There is still work to be done just to understand what needs to be adjusted.

"The pace isn't bad, but when I try to push it the problems I've mentioned come into play. I think that Checa has a pretty good advantage over us at the moment, but I need to look at my own pit and try to draw out the best from what is available to me. For tomorrow I'd like to improve on the fast lap."



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