Michelin believe that the high-speed falls during Thursday's Sepang tyre test were caused by a difference in grip balance between the front and rear rubber.

Jack Miller (Turn 5), Aleix Espargaro (Turn 5), Jorge Lorenzo (Turn 3) and Andrea Dovizioso (Turn 3) all walked away from fast accidents.

The test was the first time that race riders have tried the prototype Michelins being developed for 2016, when the French company takes over the exclusive MotoGP deal from Bridgestone.

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Speaking at Sepang, Michelin Racing's technical director Nicolas Goubert explained: "What we are lacking now is a good balance front and rear. How the tyres work together. Front and rear balance is something you hear a lot about in car racing, but you also get it in bikes.

"Basically the two accidents at Turn 3 for example were because riders opened [the throttle] probably a bit early. Maybe they wanted to take the most out of the rear grip and the front couldn't cope with opening so early.

"Some other riders, that didn't crash, said quite quickly that they couldn't use all the potential from the rear on the exit of the corner because the front is not at the right level yet."

Goubert added that the grip imbalance may have been possible to solve with bike set-up changes, but such modifications cannot be made when trying to directly compare different tyre options.

"For me it's not only a tyre issue and some manufacturers' said straight away that they could work on the setting of the bike as well. They cannot do that today because we don't have time.

"So we said ok, for the future we will work on our side and with the test riders and they will work to adjust the set-up. We have a clear diction."

Michelin brought two different front tyres and three different rear tyres. Goubert said that tyre endurance was not an issue, with the likes of world champion Marc Marquez completing a race simulation with consistent performance throughout.

Lap times were not available, but stopwatch times suggested most leading riders were able to lap in the 2m 1s. It is not thought that any rider broke the two-minute barrier.

The MotoGP riders had spent the previous three days at Sepang using Bridgestone rubber, when Marquez led the way with a lap time of 1m 59.1s during a 'time attack' and set an average of 2m 0.7s during a race simulation.

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what Michelin need to do is try somehow to push Honda with Stoner .we all agree the only way anyone can get reliable results from test riders is to use a rider of Casey's skill otherwise we get results from a slow rider who can't relate to the speeds and times of the top 5 or 6 riders . Colin nice guy as he is can't give them the feedback at the level Casey does ! Michelin start begging Honda ! or you will have severe problems ! try to nip the going backwards now !

I don't think Michelin can produce the same amount of tires Bridgestone produce, it's impossible for another tire manufacturer to produce the same cause they have different methods and materials.. I'd say they can get close. No matter how May test they make, Michelin cannot produce a Bridgestone tires, so in the end the Bike manufacturer will modify their bikes to suit the Michelin just like before whey they made it to suit the Stones.. And riders to change their styles.. If the Michelin prohibits the rider to full brake near full lean, then Marquez is at an disadvantage and Vale and Jorge will have the benefit.