Joint MotoGP title leader Jorge Lorenzo could be forced to cut back on practice during the remainder of the 2012 season, in order to compensate for the loss of a new engine during the first turn accident at Assen.

The Yamaha star saw a 25-point lead vanish when he was taken-out by Alvaro Bautista at the start of last Saturday's Dutch race, which was won by title rival Casey Stoner.

A huge cloud of smoke emitted from Lorenzo's factory M1 as it lay on its side signaled a cruel double-blow for the Spaniard.

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With just six new engines allowed per rider, per season for the manufacturer riders, Lorenzo is now facing the prospect of a pit lane start (with a ten second delay) should he need a seventh engine in the remaining eleven rounds.

To try and avoid such a penalty, the Spaniard and his team are sure to revise tactics to try and stretch their reduced engines to the end of the season.

And that could mean Lorenzo spends more time in the pits.

"It's a problem. The engine that blew up in Assen was almost new, it had 150 kilometres, and it's going to be difficult to finish the championship with the engines we have," said Lorenzo.

"But I'm going to speak to Ramon [Forcada, crew chief] and Yamaha to find out the strategy to follow. I hope we can manage to make all the practice sessions, but it's going to be difficult for sure. Some laps, some kilometres maybe we need not to do."

An alternative option would be to exceed the planned mileage on his existing engines in practice, but that would mean an increased risk of a technical failure and resulting risk of an accident.

A tamer tactic would be to slash the revs to try and extend engine life. "I don't think taking out some revs will be the solution," he said.

After the accident, for which Bautista has been punished with a back-of-the-grid start in Germany on Sunday, Lorenzo suggested Race Direction might allow him to replace the engine.

But he now concedes that will be impossible without agreement from Yamaha's rivals.

"It will be difficult to recover this engine - I think almost impossible. The only way to recover this engine is if the other brands want me to give me this engine, so I think it is quite difficult," confirmed Lorenzo.

The 2010 world champion made clear he doesn't expect the rules to be changed and is now more motivated than ever following the set back.

"The rules are the rules, and I want to accept the rules," he said.

"The [championship] situation is much more difficult than before Assen, but I like difficult things. I don't like easy things. So now I have even more motivation to keep working and to keep trying to win races. We will go up again."

Nevertheless, Lorenzo could be forgiven for smiling should the on-off rain that has kept riders in the pits at so many events this year - and which fell at the Sachsenring on Thursday - continue.

Lorenzo was walking with the aid of crutches on Thursday, but believes he will be okay to ride.

"When I crashed in Assen I just felt some pain, but not too much, then after a few hours [the ankle] swelled up," he explained.

"Then when I went to the doctor in Barcelona they told me my ligaments were stretched, and I still cannot put the foot on the ground.

"Anyway I hope tomorrow it will be ok on the bike, because you put less force on your feet. We'll have to see how I feel."