Cal Crutchlow's first priority during this weekend's home British MotoGP at Silverstone is to make it past Saturday without a visit to hospital.

The Yamaha Tech 3 rider missed his 2011 British MotoGP debut due to a broken collarbone in qualifying, then suffered a Saturday ankle fracture in last year's event.

Crutchlow was only passed fit minutes before Sunday's warm-up, but went on to thrill the home fans by charging from last on the grid to sixth in the race.

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The Englishman returns this weekend in the best form of his career, scoring four podiums and two poles to hold fifth in the standings, as the top satellite rider.

"It's not easy because there's only one British Grand Prix and, being the guy fighting near the front in MotoGP, expectation is always high, but I like a bit of pressure and there's no reason we can't do well," said Crutchlow at Silverstone on Thursday.

"I hope not to make a Saturday trip to the hospital, they've been very good to me, but I don't want to go back and see them again! If I can make it through Saturday I think we can have a good Sunday."

Crutchlow will continue with the latest Yamaha tank and seat unit this weekend, which he believes can offer greater performance once the set-up is perfected. But that task is made more complicated by Crutchlow running a different specification of frame relative to factory Yamaha riders Jorge Lorenzo and Valentino Rossi.

"There's no doubt the new parts are better, I just haven't had enough time on them," said Crutchlow. "Plus the chassis I have is not the same as the factory. I had the option to run that chassis earlier in the year, and did at one test, but didn't [like it], because then I didn't have the seat.

"Now I've got the seat but not the chassis! So I've dug my own hole! I can have the chassis back, no problem, but not this weekend. We need to test with it first."

The next official post-race test will be held after Misano, in mid-September.