By Stephen English

One of the big question marks heading into this weekend's Spanish MotoGP is whether Casey Stoner's Qatar arm pump problems have been cured.

The arm pump ultimately cost Repsol Honda's reigning world champion victory at the season-opening night race and he has used the three week break since to undergo 'secret' treatment, which worked for him in 2010.

The Australian arrived at Jerez eager to test his fitness, but his 15 laps during Friday's wet weather were insufficient to gauge his condition.

"Honestly it's not even the number of laps that create it," commented the 26 year old. "I got it on the fourth lap [in Qatar] but today was wet and conditions weren't good."

The wet conditions that blighted free practice made it impossible for Stoner to judge his condition because of the slower speeds and lower forces needed to ride in such conditions.

"The grip wasn't fantastic so there was no real pressure on the body," continued Stoner. "This is still something where we have to see if we fixed it or not."

Stoner, third in Qatar despite his arm problems, didn't set a time in the damp FP1 session, then claimed fourth place in FP2.