Honda's perfect start to 2011 extended to day five of MotoGP pre-season testing, as Casey Stoner led a Repsol Honda one-two-three at the top of the Sepang timesheets on Wednesday.

Team-mate Dani Pedrosa had been fastest for almost the entire second day, thanks to a flying fourth lap in the cooler morning conditions.

Stoner later pipped Pedrosa by just 0.058sec on his 42nd and final lap of the day, with Andrea Dovizioso just 0.360sec from the Australian in third place.

But despite leading the timesheets for the second day running, and the third time this year, Stoner revealed that most of the day had actually been unsuccessful.

"We tested a lot of things today - 2011 forks and things like that - but a good 60 percent of the day was pretty useless for us," said Stoner. "We tried a lot of configurations with the 2011 fork and shock. We found quite a lot more chattering with it. We couldn't really get on with it. So that was a bit disappointing.

"Yesterday we were working on making the bike better with what we had, and just comparing the two chassis options. Today we stayed 90 percent of the time on one chassis, just trying different fork configurations and changing geometry to try and get the bike to work with the new forks.

"We never really found something that felt good, so I was a little bit disappointed to have spent so much time on that, but it was necessary to do."

As a result of today's testing, Stoner plans to stick with the 'standard' forks for now, but intends to bring the 2011 forks - which gave an improvement under hard braking - back out at a later date.

"Maybe at the next [Qatar] test," said Stoner. "For me it's a little bit too confusing just to keep throwing different things at the bike until we get the geometry and base set-up that we want. It's better to keep it simple."

Stoner, like Pedrosa, is still to make a decision on which chassis option to use for the season ahead.

"We've got two chassis to try and sort out - like I've said, they both have strong points - once we sort that out we can move onto other things," confirmed Stoner.

"The [chassis decision] will be my main aim tomorrow... We're slowly starting to lean more towards the standard chassis.

"Hopefully we can get that sorted early and then I can try handlebar positions, we've got a few different degrees to try, similar to what I've run in the past."

Stoner also continies to seek to improved braking stability (less 'hopping') on corner entry.

"There are a couple of corners here where you stand the bike up a little bit to brake and still tip it in. If we can improve the feeling of the engine brake it will make a massive difference in these areas," he explained.

"Also if we can take 10 metres off the big braking points it'll be a lot easier to overtake people in a race."

Stoner, who has moved to Repsol Honda after winning 23 races and one world championship during at Ducati, came within 0.171sec of breaking the two-minute lap time barrier on Wednesday.

Crash.net asked Stoner if he thought the two-minute mark will be broken during Thursday's third and final day.

"Probably in the morning I'd say," he replied. "Everyone seems confident in the morning.

"I was pretty happy with my lap times today. I didn't think we'd be able to go fast this afternoon. Looking at everybody else's lap times, no-one was going fast, but we were able to get down to a 2'01.0 [on lap 36 of 42] with the hard tyre, which I was pretty happy with. We did around 25 laps on that tyre.

"Then we went out with the soft tyre, immediately felt a bit better so I just thought 'keep it smooth'. On the first lap I did a 2'0.3. The next lap the tyre gets better and we were able to come out on top. Very happy."

The official Sepang lap record, set during a race weekend, is a 2min 0.518sec, by Valentino Rossi in 2009.

Fastest of the non-Honda riders on day two was Yamaha's Ben Spies, who was 0.653sec slower than Stoner in fourth place.

With Valentino Rossi sidelined by sickness, Aspar's Hector Barbera was the top Ducati in tenth, with fellow Spaniard Alvaro Bautista eleventh for Rizla Suzuki.

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