Sep.29 (GMM) As in 2007, Honda is enduring another embarrassing struggle this season, but the rot could be set to end.

At Jerez last week, three more teams - Honda, McLaren and Williams - got their 2009 KERS systems up and running.

BMW apparently struck more problems, Williams was running a very early prototype, as was McLaren.

"Our prototype is about 18 kilograms heavier than what we are aiming for next year," McLaren chief executive Martin Whitmarsh told Germany's Auto Motor und Sport.

The same magazine reports that Honda is so far the most advanced with its KERS system for 2009.

"The extra boost is already very big," the Japanese team's test driver Alex Wurz said, after doing many laps with the system attached to an interim RA108.