Casey Stoner led an all-Honda podium at Brno, the Australian overcoming handling problems in practice to easily claim his sixth victory of the season and build his lead to a new-high of 32 points over Yamaha's Jorge Lorenzo.
Stoner and team-mate Dani Pedrosa both passed Lorenzo early on lap 3, as the reigning world champion's soft front tyre gamble began to backfire. Pole sitter Pedrosa crashed out moments later, handing Stoner a lead he would keep to the flag.
Over eight-seconds ahead at one stage, Stoner crossed the line 6.5sec ahead of team-mate Andrea Dovizioso, with Gresini Honda's Marco Simoncelli in third. Despite Pedrosa's exit, Lorenzo could only manage fourth.
“If we look at points it's an important win, and it couldn't work out much better. This weekend has been very, very tough and I was a little bit worried going into the race as to how competitive we'd be," admitted Stoner.
"As soon as the race got underway I was having a good battle with Andrea, but this cost me a little time and I was afraid that Jorge and Dani would stretch away from me. But when I got past I found I had plenty of speed to catch up and the bike felt great.
"I passed Jorge and then Dani sadly crashed out so I pushed to see if I could pull a gap. I put in a heck of a lot more effort and decided to lay it on the line. Once we had the break I just concentrated on consistency and brought it home.
"Again it's a fantastic result. This one felt good.
"Tomorrow we'll be back on the 1000 for another day of testing, so I hope the weather stays dry for us!"
The MotoGP paddock will remain at Brno for Monday's post-race test, when Stoner will get his second chance (after a two-day test at Jerez in May) to ride next year's 1000cc machine.